# libs/require/require.js

    /** vim: et:ts=4:sw=4:sts=4
     * @license RequireJS 2.1.15 Copyright (c) 2010-2014, The Dojo Foundation All Rights Reserved.
     * Available via the MIT or new BSD license.
     * see: http://github.com/jrburke/requirejs for details
     */
    //Not using strict: uneven strict support in browsers, #392, and causes
    //problems with requirejs.exec()/transpiler plugins that may not be strict.
    /*jslint regexp: true, nomen: true, sloppy: true */
    /*global window, navigator, document, importScripts, setTimeout, opera */

    var requirejs, require, define;
    (function(global) {
    	var req, s, head, baseElement, dataMain, src, interactiveScript, currentlyAddingScript, mainScript, subPath, version = '2.1.15', commentRegExp = /(\/\*([\s\S]*?)\*\/|([^:]|^)\/\/(.*)$)/mg, cjsRequireRegExp = /[^.]\s*require\s*\(\s*["']([^'"\s]+)["']\s*\)/g, jsSuffixRegExp = /\.js$/, currDirRegExp = /^\.\//, op = Object.prototype, ostring = op.toString, hasOwn = op.hasOwnProperty, ap = Array.prototype, apsp = ap.splice, isBrowser = !!(typeof window !== 'undefined'
    			&& typeof navigator !== 'undefined' && window.document), isWebWorker = !isBrowser && typeof importScripts !== 'undefined',
    	//PS3 indicates loaded and complete, but need to wait for complete
    	//specifically. Sequence is 'loading', 'loaded', execution,
    	// then 'complete'. The UA check is unfortunate, but not sure how
    	//to feature test w/o causing perf issues.
    	readyRegExp = isBrowser && navigator.platform === 'PLAYSTATION 3' ? /^complete$/ : /^(complete|loaded)$/, defContextName = '_',
    	//Oh the tragedy, detecting opera. See the usage of isOpera for reason.
    	isOpera = typeof opera !== 'undefined' && opera.toString() === '[object Opera]', contexts = {}, cfg = {}, globalDefQueue = [], useInteractive = false;

    	function isFunction(it) {
    		return ostring.call(it) === '[object Function]';
    	}

    	function isArray(it) {
    		return ostring.call(it) === '[object Array]';
    	}

    	/**
    	 * Helper function for iterating over an array. If the func returns
    	 * a true value, it will break out of the loop.
    	 */
    	function each(ary,func) {
    		if (ary) {
    			var i;
    			for (i = 0; i < ary.length; i += 1) {
    				if (ary[i] && func(ary[i], i, ary)) {
    					break;
    				}
    			}
    		}
    	}

    	/**
    	 * Helper function for iterating over an array backwards. If the func
    	 * returns a true value, it will break out of the loop.
    	 */
    	function eachReverse(ary,func) {
    		if (ary) {
    			var i;
    			for (i = ary.length - 1; i > -1; i -= 1) {
    				if (ary[i] && func(ary[i], i, ary)) {
    					break;
    				}
    			}
    		}
    	}

    	function hasProp(obj,prop) {
    		return hasOwn.call(obj, prop);
    	}

    	function getOwn(obj,prop) {
    		return hasProp(obj, prop) && obj[prop];
    	}

    	/**
    	 * Cycles over properties in an object and calls a function for each
    	 * property value. If the function returns a truthy value, then the
    	 * iteration is stopped.
    	 */
    	function eachProp(obj,func) {
    		var prop;
    		for (prop in obj) {
    			if (hasProp(obj, prop)) {
    				if (func(obj[prop], prop)) {
    					break;
    				}
    			}
    		}
    	}

    	/**
    	 * Simple function to mix in properties from source into target,
    	 * but only if target does not already have a property of the same name.
    	 */
    	function mixin(target,source,force,deepStringMixin) {
    		if (source) {
    			eachProp(source, function(value,prop) {
    				if (force || !hasProp(target, prop)) {
    					if (deepStringMixin && typeof value === 'object' && value && !isArray(value) && !isFunction(value) && !(value instanceof RegExp)) {

    						if (!target[prop]) {
    							target[prop] = {};
    						}
    						mixin(target[prop], value, force, deepStringMixin);
    					} else {
    						target[prop] = value;
    					}
    				}
    			});
    		}
    		return target;
    	}

    	//Similar to Function.prototype.bind, but the 'this' object is specified
    	//first, since it is easier to read/figure out what 'this' will be.
    	function bind(obj,fn) {
    		return function() {
    			return fn.apply(obj, arguments);
    		};
    	}

    	function scripts() {
    		return document.getElementsByTagName('script');
    	}

    	function defaultOnError(err) {
    		throw err;
    	}

    	//Allow getting a global that is expressed in
    	//dot notation, like 'a.b.c'.
    	function getGlobal(value) {
    		if (!value) {
    			return value;
    		}
    		var g = global;
    		each(value.split('.'), function(part) {
    			g = g[part];
    		});
    		return g;
    	}

    	/**
    	 * Constructs an error with a pointer to an URL with more information.
    	 * @param {String} id the error ID that maps to an ID on a web page.
    	 * @param {String} message human readable error.
    	 * @param {Error} [err] the original error, if there is one.
    	 *
    	 * @returns {Error}
    	 */
    	function makeError(id,msg,err,requireModules) {
    		var e = new Error(msg + '\nhttp://requirejs.org/docs/errors.html#' + id);
    		e.requireType = id;
    		e.requireModules = requireModules;
    		if (err) {
    			e.originalError = err;
    		}
    		return e;
    	}

    	if (typeof define !== 'undefined') {
    		//If a define is already in play via another AMD loader,
    		//do not overwrite.
    		return;
    	}

    	if (typeof requirejs !== 'undefined') {
    		if (isFunction(requirejs)) {
    			//Do not overwrite an existing requirejs instance.
    			return;
    		}
    		cfg = requirejs;
    		requirejs = undefined;
    	}

    	//Allow for a require config object
    	if (typeof require !== 'undefined' && !isFunction(require)) {
    		//assume it is a config object.
    		cfg = require;
    		require = undefined;
    	}

    	function newContext(contextName) {
    		var inCheckLoaded, Module, context, handlers, checkLoadedTimeoutId, config = {
    			//Defaults. Do not set a default for map
    			//config to speed up normalize(), which
    			//will run faster if there is no default.
    			waitSeconds : 7,
    			baseUrl : './',
    			paths : {},
    			bundles : {},
    			pkgs : {},
    			shim : {},
    			config : {}
    		}, registry = {},
    		//registry of just enabled modules, to speed
    		//cycle breaking code when lots of modules
    		//are registered, but not activated.
    		enabledRegistry = {}, undefEvents = {}, defQueue = [], defined = {}, urlFetched = {}, bundlesMap = {}, requireCounter = 1, unnormalizedCounter = 1;

    		/**
    		 * Trims the . and .. from an array of path segments.
    		 * It will keep a leading path segment if a .. will become
    		 * the first path segment, to help with module name lookups,
    		 * which act like paths, but can be remapped. But the end result,
    		 * all paths that use this function should look normalized.
    		 * NOTE: this method MODIFIES the input array.
    		 * @param {Array} ary the array of path segments.
    		 */
    		function trimDots(ary) {
    			var i, part;
    			for (i = 0; i < ary.length; i++) {
    				part = ary[i];
    				if (part === '.') {
    					ary.splice(i, 1);
    					i -= 1;
    				} else if (part === '..') {
    					// If at the start, or previous value is still ..,
    					// keep them so that when converted to a path it may
    					// still work when converted to a path, even though
    					// as an ID it is less than ideal. In larger point
    					// releases, may be better to just kick out an error.
    					if (i === 0 || (i == 1 && ary[2] === '..') || ary[i - 1] === '..') {
    						continue;
    					} else if (i > 0) {
    						ary.splice(i - 1, 2);
    						i -= 2;
    					}
    				}
    			}
    		}

    		/**
    		 * Given a relative module name, like ./something, normalize it to
    		 * a real name that can be mapped to a path.
    		 * @param {String} name the relative name
    		 * @param {String} baseName a real name that the name arg is relative
    		 * to.
    		 * @param {Boolean} applyMap apply the map config to the value. Should
    		 * only be done if this normalization is for a dependency ID.
    		 * @returns {String} normalized name
    		 */
    		function normalize(name,baseName,applyMap) {
    			var pkgMain, mapValue, nameParts, i, j, nameSegment, lastIndex, foundMap, foundI, foundStarMap, starI, normalizedBaseParts, baseParts = (baseName && baseName.split('/')), map = config.map, starMap = map && map['*'];

    			//Adjust any relative paths.
    			if (name) {
    				name = name.split('/');
    				lastIndex = name.length - 1;

    				// If wanting node ID compatibility, strip .js from end
    				// of IDs. Have to do this here, and not in nameToUrl
    				// because node allows either .js or non .js to map
    				// to same file.
    				if (config.nodeIdCompat && jsSuffixRegExp.test(name[lastIndex])) {
    					name[lastIndex] = name[lastIndex].replace(jsSuffixRegExp, '');
    				}

    				// Starts with a '.' so need the baseName
    				if (name[0].charAt(0) === '.' && baseParts) {
    					//Convert baseName to array, and lop off the last part,
    					//so that . matches that 'directory' and not name of the baseName's
    					//module. For instance, baseName of 'one/two/three', maps to
    					//'one/two/three.js', but we want the directory, 'one/two' for
    					//this normalization.
    					normalizedBaseParts = baseParts.slice(0, baseParts.length - 1);
    					name = normalizedBaseParts.concat(name);
    				}

    				trimDots(name);
    				name = name.join('/');
    			}

    			//Apply map config if available.
    			if (applyMap && map && (baseParts || starMap)) {
    				nameParts = name.split('/');

    				outerLoop: for (i = nameParts.length; i > 0; i -= 1) {
    					nameSegment = nameParts.slice(0, i).join('/');

    					if (baseParts) {
    						//Find the longest baseName segment match in the config.
    						//So, do joins on the biggest to smallest lengths of baseParts.
    						for (j = baseParts.length; j > 0; j -= 1) {
    							mapValue = getOwn(map, baseParts.slice(0, j).join('/'));

    							//baseName segment has config, find if it has one for
    							//this name.
    							if (mapValue) {
    								mapValue = getOwn(mapValue, nameSegment);
    								if (mapValue) {
    									//Match, update name to the new value.
    									foundMap = mapValue;
    									foundI = i;
    									break outerLoop;
    								}
    							}
    						}
    					}

    					//Check for a star map match, but just hold on to it,
    					//if there is a shorter segment match later in a matching
    					//config, then favor over this star map.
    					if (!foundStarMap && starMap && getOwn(starMap, nameSegment)) {
    						foundStarMap = getOwn(starMap, nameSegment);
    						starI = i;
    					}
    				}

    				if (!foundMap && foundStarMap) {
    					foundMap = foundStarMap;
    					foundI = starI;
    				}

    				if (foundMap) {
    					nameParts.splice(0, foundI, foundMap);
    					name = nameParts.join('/');
    				}
    			}

    			// If the name points to a package's name, use
    			// the package main instead.
    			pkgMain = getOwn(config.pkgs, name);

    			return pkgMain ? pkgMain : name;
    		}

    		function removeScript(name) {
    			if (isBrowser) {
    				each(scripts(), function(scriptNode) {
    					if (scriptNode.getAttribute('data-requiremodule') === name && scriptNode.getAttribute('data-requirecontext') === context.contextName) {
    						scriptNode.parentNode.removeChild(scriptNode);
    						return true;
    					}
    				});
    			}
    		}

    		function hasPathFallback(id) {
    			var pathConfig = getOwn(config.paths, id);
    			if (pathConfig && isArray(pathConfig) && pathConfig.length > 1) {
    				//Pop off the first array value, since it failed, and
    				//retry
    				pathConfig.shift();
    				context.require.undef(id);

    				//Custom require that does not do map translation, since
    				//ID is "absolute", already mapped/resolved.
    				context.makeRequire(null, {
    					skipMap : true
    				})([
    					id
    				]);

    				return true;
    			}
    		}

    		//Turns a plugin!resource to [plugin, resource]
    		//with the plugin being undefined if the name
    		//did not have a plugin prefix.
    		function splitPrefix(name) {
    			var prefix, index = name ? name.indexOf('!') : -1;
    			if (index > -1) {
    				prefix = name.substring(0, index);
    				name = name.substring(index + 1, name.length);
    			}
    			return [
    					prefix, name
    			];
    		}

    		/**
    		 * Creates a module mapping that includes plugin prefix, module
    		 * name, and path. If parentModuleMap is provided it will
    		 * also normalize the name via require.normalize()
    		 *
    		 * @param {String} name the module name
    		 * @param {String} [parentModuleMap] parent module map
    		 * for the module name, used to resolve relative names.
    		 * @param {Boolean} isNormalized: is the ID already normalized.
    		 * This is true if this call is done for a define() module ID.
    		 * @param {Boolean} applyMap: apply the map config to the ID.
    		 * Should only be true if this map is for a dependency.
    		 *
    		 * @returns {Object}
    		 */
    		function makeModuleMap(name,parentModuleMap,isNormalized,applyMap) {
    			var url, pluginModule, suffix, nameParts, prefix = null, parentName = parentModuleMap ? parentModuleMap.name : null, originalName = name, isDefine = true, normalizedName = '';

    			//If no name, then it means it is a require call, generate an
    			//internal name.
    			if (!name) {
    				isDefine = false;
    				name = '_@r' + (requireCounter += 1);
    			}

    			nameParts = splitPrefix(name);
    			prefix = nameParts[0];
    			name = nameParts[1];

    			if (prefix) {
    				prefix = normalize(prefix, parentName, applyMap);
    				pluginModule = getOwn(defined, prefix);
    			}

    			//Account for relative paths if there is a base name.
    			if (name) {
    				if (prefix) {
    					if (pluginModule && pluginModule.normalize) {
    						//Plugin is loaded, use its normalize method.
    						normalizedName = pluginModule.normalize(name, function(name) {
    							return normalize(name, parentName, applyMap);
    						});
    					} else {
    						// If nested plugin references, then do not try to
    						// normalize, as it will not normalize correctly. This
    						// places a restriction on resourceIds, and the longer
    						// term solution is not to normalize until plugins are
    						// loaded and all normalizations to allow for async
    						// loading of a loader plugin. But for now, fixes the
    						// common uses. Details in #1131
    						normalizedName = name.indexOf('!') === -1 ? normalize(name, parentName, applyMap) : name;
    					}
    				} else {
    					//A regular module.
    					normalizedName = normalize(name, parentName, applyMap);

    					//Normalized name may be a plugin ID due to map config
    					//application in normalize. The map config values must
    					//already be normalized, so do not need to redo that part.
    					nameParts = splitPrefix(normalizedName);
    					prefix = nameParts[0];
    					normalizedName = nameParts[1];
    					isNormalized = true;

    					url = context.nameToUrl(normalizedName);
    				}
    			}

    			//If the id is a plugin id that cannot be determined if it needs
    			//normalization, stamp it with a unique ID so two matching relative
    			//ids that may conflict can be separate.
    			suffix = prefix && !pluginModule && !isNormalized ? '_unnormalized' + (unnormalizedCounter += 1) : '';

    			return {
    				prefix : prefix,
    				name : normalizedName,
    				parentMap : parentModuleMap,
    				unnormalized : !!suffix,
    				url : url,
    				originalName : originalName,
    				isDefine : isDefine,
    				id : (prefix ? prefix + '!' + normalizedName : normalizedName) + suffix
    			};
    		}

    		function getModule(depMap) {
    			var id = depMap.id, mod = getOwn(registry, id);

    			if (!mod) {
    				mod = registry[id] = new context.Module(depMap);
    			}

    			return mod;
    		}

    		function on(depMap,name,fn) {
    			var id = depMap.id, mod = getOwn(registry, id);

    			if (hasProp(defined, id) && (!mod || mod.defineEmitComplete)) {
    				if (name === 'defined') {
    					fn(defined[id]);
    				}
    			} else {
    				mod = getModule(depMap);
    				if (mod.error && name === 'error') {
    					fn(mod.error);
    				} else {
    					mod.on(name, fn);
    				}
    			}
    		}

    		function onError(err,errback) {
    			var ids = err.requireModules, notified = false;

    			if (errback) {
    				errback(err);
    			} else {
    				each(ids, function(id) {
    					var mod = getOwn(registry, id);
    					if (mod) {
    						//Set error on module, so it skips timeout checks.
    						mod.error = err;
    						if (mod.events.error) {
    							notified = true;
    							mod.emit('error', err);
    						}
    					}
    				});

    				if (!notified) {
    					req.onError(err);
    				}
    			}
    		}

    		/**
    		 * Internal method to transfer globalQueue items to this context's
    		 * defQueue.
    		 */
    		function takeGlobalQueue() {
    			//Push all the globalDefQueue items into the context's defQueue
    			if (globalDefQueue.length) {
    				//Array splice in the values since the context code has a
    				//local var ref to defQueue, so cannot just reassign the one
    				//on context.
    				apsp.apply(defQueue, [
    						defQueue.length, 0
    				].concat(globalDefQueue));
    				globalDefQueue = [];
    			}
    		}

    		handlers = {
    			'require' : function(mod) {
    				if (mod.require) {
    					return mod.require;
    				} else {
    					return (mod.require = context.makeRequire(mod.map));
    				}
    			},
    			'exports' : function(mod) {
    				mod.usingExports = true;
    				if (mod.map.isDefine) {
    					if (mod.exports) {
    						return (defined[mod.map.id] = mod.exports);
    					} else {
    						return (mod.exports = defined[mod.map.id] = {});
    					}
    				}
    			},
    			'module' : function(mod) {
    				if (mod.module) {
    					return mod.module;
    				} else {
    					return (mod.module = {
    						id : mod.map.id,
    						uri : mod.map.url,
    						config : function() {
    							return getOwn(config.config, mod.map.id) || {};
    						},
    						exports : mod.exports || (mod.exports = {})
    					});
    				}
    			}
    		};

    		function cleanRegistry(id) {
    			//Clean up machinery used for waiting modules.
    			delete registry[id];
    			delete enabledRegistry[id];
    		}

    		function breakCycle(mod,traced,processed) {
    			var id = mod.map.id;

    			if (mod.error) {
    				mod.emit('error', mod.error);
    			} else {
    				traced[id] = true;
    				each(mod.depMaps, function(depMap,i) {
    					var depId = depMap.id, dep = getOwn(registry, depId);

    					//Only force things that have not completed
    					//being defined, so still in the registry,
    					//and only if it has not been matched up
    					//in the module already.
    					if (dep && !mod.depMatched[i] && !processed[depId]) {
    						if (getOwn(traced, depId)) {
    							mod.defineDep(i, defined[depId]);
    							mod.check(); //pass false?
    						} else {
    							breakCycle(dep, traced, processed);
    						}
    					}
    				});
    				processed[id] = true;
    			}
    		}

    		function checkLoaded() {
    			var err, usingPathFallback, waitInterval = config.waitSeconds * 1000,
    			//It is possible to disable the wait interval by using waitSeconds of 0.
    			expired = waitInterval && (context.startTime + waitInterval) < new Date().getTime(), noLoads = [], reqCalls = [], stillLoading = false, needCycleCheck = true;

    			//Do not bother if this call was a result of a cycle break.
    			if (inCheckLoaded) {
    				return;
    			}

    			inCheckLoaded = true;

    			//Figure out the state of all the modules.
    			eachProp(enabledRegistry, function(mod) {
    				var map = mod.map, modId = map.id;

    				//Skip things that are not enabled or in error state.
    				if (!mod.enabled) {
    					return;
    				}

    				if (!map.isDefine) {
    					reqCalls.push(mod);
    				}

    				if (!mod.error) {
    					//If the module should be executed, and it has not
    					//been inited and time is up, remember it.
    					if (!mod.inited && expired) {
    						if (hasPathFallback(modId)) {
    							usingPathFallback = true;
    							stillLoading = true;
    						} else {
    							noLoads.push(modId);
    							removeScript(modId);
    						}
    					} else if (!mod.inited && mod.fetched && map.isDefine) {
    						stillLoading = true;
    						if (!map.prefix) {
    							//No reason to keep looking for unfinished
    							//loading. If the only stillLoading is a
    							//plugin resource though, keep going,
    							//because it may be that a plugin resource
    							//is waiting on a non-plugin cycle.
    							return (needCycleCheck = false);
    						}
    					}
    				}
    			});

    			if (expired && noLoads.length) {
    				//If wait time expired, throw error of unloaded modules.
    				err = makeError('timeout', 'Load timeout for modules: ' + noLoads, null, noLoads);
    				err.contextName = context.contextName;
    				return onError(err);
    			}

    			//Not expired, check for a cycle.
    			if (needCycleCheck) {
    				each(reqCalls, function(mod) {
    					breakCycle(mod, {}, {});
    				});
    			}

    			//If still waiting on loads, and the waiting load is something
    			//other than a plugin resource, or there are still outstanding
    			//scripts, then just try back later.
    			if ((!expired || usingPathFallback) && stillLoading) {
    				//Something is still waiting to load. Wait for it, but only
    				//if a timeout is not already in effect.
    				if ((isBrowser || isWebWorker) && !checkLoadedTimeoutId) {
    					checkLoadedTimeoutId = setTimeout(function() {
    						checkLoadedTimeoutId = 0;
    						checkLoaded();
    					}, 50);
    				}
    			}

    			inCheckLoaded = false;
    		}

    		Module = function(map) {
    			this.events = getOwn(undefEvents, map.id) || {};
    			this.map = map;
    			this.shim = getOwn(config.shim, map.id);
    			this.depExports = [];
    			this.depMaps = [];
    			this.depMatched = [];
    			this.pluginMaps = {};
    			this.depCount = 0;

    			/* this.exports this.factory
    			   this.depMaps = [],
    			   this.enabled, this.fetched
    			*/
    		};

    		Module.prototype = {
    			init : function(depMaps,factory,errback,options) {
    				options = options || {};

    				//Do not do more inits if already done. Can happen if there
    				//are multiple define calls for the same module. That is not
    				//a normal, common case, but it is also not unexpected.
    				if (this.inited) {
    					return;
    				}

    				this.factory = factory;

    				if (errback) {
    					//Register for errors on this module.
    					this.on('error', errback);
    				} else if (this.events.error) {
    					//If no errback already, but there are error listeners
    					//on this module, set up an errback to pass to the deps.
    					errback = bind(this, function(err) {
    						this.emit('error', err);
    					});
    				}

    				//Do a copy of the dependency array, so that
    				//source inputs are not modified. For example
    				//"shim" deps are passed in here directly, and
    				//doing a direct modification of the depMaps array
    				//would affect that config.
    				this.depMaps = depMaps && depMaps.slice(0);

    				this.errback = errback;

    				//Indicate this module has be initialized
    				this.inited = true;

    				this.ignore = options.ignore;

    				//Could have option to init this module in enabled mode,
    				//or could have been previously marked as enabled. However,
    				//the dependencies are not known until init is called. So
    				//if enabled previously, now trigger dependencies as enabled.
    				if (options.enabled || this.enabled) {
    					//Enable this module and dependencies.
    					//Will call this.check()
    					this.enable();
    				} else {
    					this.check();
    				}
    			},

    			defineDep : function(i,depExports) {
    				//Because of cycles, defined callback for a given
    				//export can be called more than once.
    				if (!this.depMatched[i]) {
    					this.depMatched[i] = true;
    					this.depCount -= 1;
    					this.depExports[i] = depExports;
    				}
    			},

    			fetch : function() {
    				if (this.fetched) {
    					return;
    				}
    				this.fetched = true;

    				context.startTime = (new Date()).getTime();

    				var map = this.map;

    				//If the manager is for a plugin managed resource,
    				//ask the plugin to load it now.
    				if (this.shim) {
    					context.makeRequire(this.map, {
    						enableBuildCallback : true
    					})(this.shim.deps || [], bind(this, function() {
    						return map.prefix ? this.callPlugin() : this.load();
    					}));
    				} else {
    					//Regular dependency.
    					return map.prefix ? this.callPlugin() : this.load();
    				}
    			},

    			load : function() {
    				var url = this.map.url;

    				//Regular dependency.
    				if (!urlFetched[url]) {
    					urlFetched[url] = true;
    					context.load(this.map.id, url);
    				}
    			},

    			/**
    			 * Checks if the module is ready to define itself, and if so,
    			 * define it.
    			 */
    			check : function() {
    				if (!this.enabled || this.enabling) {
    					return;
    				}

    				var err, cjsModule, id = this.map.id, depExports = this.depExports, exports = this.exports, factory = this.factory;

    				if (!this.inited) {
    					this.fetch();
    				} else if (this.error) {
    					this.emit('error', this.error);
    				} else if (!this.defining) {
    					//The factory could trigger another require call
    					//that would result in checking this module to
    					//define itself again. If already in the process
    					//of doing that, skip this work.
    					this.defining = true;

    					if (this.depCount < 1 && !this.defined) {
    						if (isFunction(factory)) {
    							//If there is an error listener, favor passing
    							//to that instead of throwing an error. However,
    							//only do it for define()'d  modules. require
    							//errbacks should not be called for failures in
    							//their callbacks (#699). However if a global
    							//onError is set, use that.
    							if ((this.events.error && this.map.isDefine) || req.onError !== defaultOnError) {
    								try {
    									exports = context.execCb(id, factory, depExports, exports);
    								} catch (e) {
    									err = e;
    								}
    							} else {
    								exports = context.execCb(id, factory, depExports, exports);
    							}

    							// Favor return value over exports. If node/cjs in play,
    							// then will not have a return value anyway. Favor
    							// module.exports assignment over exports object.
    							if (this.map.isDefine && exports === undefined) {
    								cjsModule = this.module;
    								if (cjsModule) {
    									exports = cjsModule.exports;
    								} else if (this.usingExports) {
    									//exports already set the defined value.
    									exports = this.exports;
    								}
    							}

    							if (err) {
    								err.requireMap = this.map;
    								err.requireModules = this.map.isDefine ? [
    									this.map.id
    								] : null;
    								err.requireType = this.map.isDefine ? 'define' : 'require';
    								return onError((this.error = err));
    							}

    						} else {
    							//Just a literal value
    							exports = factory;
    						}

    						this.exports = exports;

    						if (this.map.isDefine && !this.ignore) {
    							defined[id] = exports;

    							if (req.onResourceLoad) {
    								req.onResourceLoad(context, this.map, this.depMaps);
    							}
    						}

    						//Clean up
    						cleanRegistry(id);

    						this.defined = true;
    					}

    					//Finished the define stage. Allow calling check again
    					//to allow define notifications below in the case of a
    					//cycle.
    					this.defining = false;

    					if (this.defined && !this.defineEmitted) {
    						this.defineEmitted = true;
    						this.emit('defined', this.exports);
    						this.defineEmitComplete = true;
    					}

    				}
    			},

    			callPlugin : function() {
    				var map = this.map, id = map.id,
    				//Map already normalized the prefix.
    				pluginMap = makeModuleMap(map.prefix);

    				//Mark this as a dependency for this plugin, so it
    				//can be traced for cycles.
    				this.depMaps.push(pluginMap);

    				on(pluginMap, 'defined', bind(this, function(plugin) {
    					var load, normalizedMap, normalizedMod, bundleId = getOwn(bundlesMap, this.map.id), name = this.map.name, parentName = this.map.parentMap ? this.map.parentMap.name : null, localRequire = context.makeRequire(map.parentMap, {
    						enableBuildCallback : true
    					});

    					//If current map is not normalized, wait for that
    					//normalized name to load instead of continuing.
    					if (this.map.unnormalized) {
    						//Normalize the ID if the plugin allows it.
    						if (plugin.normalize) {
    							name = plugin.normalize(name, function(name) {
    								return normalize(name, parentName, true);
    							}) || '';
    						}

    						//prefix and name should already be normalized, no need
    						//for applying map config again either.
    						normalizedMap = makeModuleMap(map.prefix + '!' + name, this.map.parentMap);
    						on(normalizedMap, 'defined', bind(this, function(value) {
    							this.init([], function() {
    								return value;
    							}, null, {
    								enabled : true,
    								ignore : true
    							});
    						}));

    						normalizedMod = getOwn(registry, normalizedMap.id);
    						if (normalizedMod) {
    							//Mark this as a dependency for this plugin, so it
    							//can be traced for cycles.
    							this.depMaps.push(normalizedMap);

    							if (this.events.error) {
    								normalizedMod.on('error', bind(this, function(err) {
    									this.emit('error', err);
    								}));
    							}
    							normalizedMod.enable();
    						}

    						return;
    					}

    					//If a paths config, then just load that file instead to
    					//resolve the plugin, as it is built into that paths layer.
    					if (bundleId) {
    						this.map.url = context.nameToUrl(bundleId);
    						this.load();
    						return;
    					}

    					load = bind(this, function(value) {
    						this.init([], function() {
    							return value;
    						}, null, {
    							enabled : true
    						});
    					});

    					load.error = bind(this, function(err) {
    						this.inited = true;
    						this.error = err;
    						err.requireModules = [
    							id
    						];

    						//Remove temp unnormalized modules for this module,
    						//since they will never be resolved otherwise now.
    						eachProp(registry, function(mod) {
    							if (mod.map.id.indexOf(id + '_unnormalized') === 0) {
    								cleanRegistry(mod.map.id);
    							}
    						});

    						onError(err);
    					});

    					//Allow plugins to load other code without having to know the
    					//context or how to 'complete' the load.
    					load.fromText = bind(this, function(text,textAlt) {
    						/*jslint evil: true */
    						var moduleName = map.name, moduleMap = makeModuleMap(moduleName), hasInteractive = useInteractive;

    						//As of 2.1.0, support just passing the text, to reinforce
    						//fromText only being called once per resource. Still
    						//support old style of passing moduleName but discard
    						//that moduleName in favor of the internal ref.
    						if (textAlt) {
    							text = textAlt;
    						}

    						//Turn off interactive script matching for IE for any define
    						//calls in the text, then turn it back on at the end.
    						if (hasInteractive) {
    							useInteractive = false;
    						}

    						//Prime the system by creating a module instance for
    						//it.
    						getModule(moduleMap);

    						//Transfer any config to this other module.
    						if (hasProp(config.config, id)) {
    							config.config[moduleName] = config.config[id];
    						}

    						try {
    							req.exec(text);
    						} catch (e) {
    							return onError(makeError('fromtexteval', 'fromText eval for ' + id + ' failed: ' + e, e, [
    								id
    							]));
    						}

    						if (hasInteractive) {
    							useInteractive = true;
    						}

    						//Mark this as a dependency for the plugin
    						//resource
    						this.depMaps.push(moduleMap);

    						//Support anonymous modules.
    						context.completeLoad(moduleName);

    						//Bind the value of that module to the value for this
    						//resource ID.
    						localRequire([
    							moduleName
    						], load);
    					});

    					//Use parentName here since the plugin's name is not reliable,
    					//could be some weird string with no path that actually wants to
    					//reference the parentName's path.
    					plugin.load(map.name, localRequire, load, config);
    				}));

    				context.enable(pluginMap, this);
    				this.pluginMaps[pluginMap.id] = pluginMap;
    			},

    			enable : function() {
    				enabledRegistry[this.map.id] = this;
    				this.enabled = true;

    				//Set flag mentioning that the module is enabling,
    				//so that immediate calls to the defined callbacks
    				//for dependencies do not trigger inadvertent load
    				//with the depCount still being zero.
    				this.enabling = true;

    				//Enable each dependency
    				each(this.depMaps, bind(this, function(depMap,i) {
    					var id, mod, handler;

    					if (typeof depMap === 'string') {
    						//Dependency needs to be converted to a depMap
    						//and wired up to this module.
    						depMap = makeModuleMap(depMap, (this.map.isDefine ? this.map : this.map.parentMap), false, !this.skipMap);
    						this.depMaps[i] = depMap;

    						handler = getOwn(handlers, depMap.id);

    						if (handler) {
    							this.depExports[i] = handler(this);
    							return;
    						}

    						this.depCount += 1;

    						on(depMap, 'defined', bind(this, function(depExports) {
    							this.defineDep(i, depExports);
    							this.check();
    						}));

    						if (this.errback) {
    							on(depMap, 'error', bind(this, this.errback));
    						}
    					}

    					id = depMap.id;
    					mod = registry[id];

    					//Skip special modules like 'require', 'exports', 'module'
    					//Also, don't call enable if it is already enabled,
    					//important in circular dependency cases.
    					if (!hasProp(handlers, id) && mod && !mod.enabled) {
    						context.enable(depMap, this);
    					}
    				}));

    				//Enable each plugin that is used in
    				//a dependency
    				eachProp(this.pluginMaps, bind(this, function(pluginMap) {
    					var mod = getOwn(registry, pluginMap.id);
    					if (mod && !mod.enabled) {
    						context.enable(pluginMap, this);
    					}
    				}));

    				this.enabling = false;

    				this.check();
    			},

    			on : function(name,cb) {
    				var cbs = this.events[name];
    				if (!cbs) {
    					cbs = this.events[name] = [];
    				}
    				cbs.push(cb);
    			},

    			emit : function(name,evt) {
    				each(this.events[name], function(cb) {
    					cb(evt);
    				});
    				if (name === 'error') {
    					//Now that the error handler was triggered, remove
    					//the listeners, since this broken Module instance
    					//can stay around for a while in the registry.
    					delete this.events[name];
    				}
    			}
    		};

    		function callGetModule(args) {
    			//Skip modules already defined.
    			if (!hasProp(defined, args[0])) {
    				getModule(makeModuleMap(args[0], null, true)).init(args[1], args[2]);
    			}
    		}

    		function removeListener(node,func,name,ieName) {
    			//Favor detachEvent because of IE9
    			//issue, see attachEvent/addEventListener comment elsewhere
    			//in this file.
    			if (node.detachEvent && !isOpera) {
    				//Probably IE. If not it will throw an error, which will be
    				//useful to know.
    				if (ieName) {
    					node.detachEvent(ieName, func);
    				}
    			} else {
    				node.removeEventListener(name, func, false);
    			}
    		}

    		/**
    		 * Given an event from a script node, get the requirejs info from it,
    		 * and then removes the event listeners on the node.
    		 * @param {Event} evt
    		 * @returns {Object}
    		 */
    		function getScriptData(evt) {
    			//Using currentTarget instead of target for Firefox 2.0's sake. Not
    			//all old browsers will be supported, but this one was easy enough
    			//to support and still makes sense.
    			var node = evt.currentTarget || evt.srcElement;

    			//Remove the listeners once here.
    			removeListener(node, context.onScriptLoad, 'load', 'onreadystatechange');
    			removeListener(node, context.onScriptError, 'error');

    			return {
    				node : node,
    				id : node && node.getAttribute('data-requiremodule')
    			};
    		}

    		function intakeDefines() {
    			var args;

    			//Any defined modules in the global queue, intake them now.
    			takeGlobalQueue();

    			//Make sure any remaining defQueue items get properly processed.
    			while (defQueue.length) {
    				args = defQueue.shift();
    				if (args[0] === null) {
    					return onError(makeError('mismatch', 'Mismatched anonymous define() module: ' + args[args.length - 1]));
    				} else {
    					//args are id, deps, factory. Should be normalized by the
    					//define() function.
    					callGetModule(args);
    				}
    			}
    		}

    		context = {
    			config : config,
    			contextName : contextName,
    			registry : registry,
    			defined : defined,
    			urlFetched : urlFetched,
    			defQueue : defQueue,
    			Module : Module,
    			makeModuleMap : makeModuleMap,
    			nextTick : req.nextTick,
    			onError : onError,

    			/**
    			 * Set a configuration for the context.
    			 * @param {Object} cfg config object to integrate.
    			 */
    			configure : function(cfg) {
    				//Make sure the baseUrl ends in a slash.
    				if (cfg.baseUrl) {
    					if (cfg.baseUrl.charAt(cfg.baseUrl.length - 1) !== '/') {
    						cfg.baseUrl += '/';
    					}
    				}

    				//Save off the paths since they require special processing,
    				//they are additive.
    				var shim = config.shim, objs = {
    					paths : true,
    					bundles : true,
    					config : true,
    					map : true
    				};

    				eachProp(cfg, function(value,prop) {
    					if (objs[prop]) {
    						if (!config[prop]) {
    							config[prop] = {};
    						}
    						mixin(config[prop], value, true, true);
    					} else {
    						config[prop] = value;
    					}
    				});

    				//Reverse map the bundles
    				if (cfg.bundles) {
    					eachProp(cfg.bundles, function(value,prop) {
    						each(value, function(v) {
    							if (v !== prop) {
    								bundlesMap[v] = prop;
    							}
    						});
    					});
    				}

    				//Merge shim
    				if (cfg.shim) {
    					eachProp(cfg.shim, function(value,id) {
    						//Normalize the structure
    						if (isArray(value)) {
    							value = {
    								deps : value
    							};
    						}
    						if ((value.exports || value.init) && !value.exportsFn) {
    							value.exportsFn = context.makeShimExports(value);
    						}
    						shim[id] = value;
    					});
    					config.shim = shim;
    				}

    				//Adjust packages if necessary.
    				if (cfg.packages) {
    					each(cfg.packages, function(pkgObj) {
    						var location, name;

    						pkgObj = typeof pkgObj === 'string' ? {
    							name : pkgObj
    						} : pkgObj;

    						name = pkgObj.name;
    						location = pkgObj.location;
    						if (location) {
    							config.paths[name] = pkgObj.location;
    						}

    						//Save pointer to main module ID for pkg name.
    						//Remove leading dot in main, so main paths are normalized,
    						//and remove any trailing .js, since different package
    						//envs have different conventions: some use a module name,
    						//some use a file name.
    						config.pkgs[name] = pkgObj.name + '/' + (pkgObj.main || 'main').replace(currDirRegExp, '').replace(jsSuffixRegExp, '');
    					});
    				}

    				//If there are any "waiting to execute" modules in the registry,
    				//update the maps for them, since their info, like URLs to load,
    				//may have changed.
    				eachProp(registry, function(mod,id) {
    					//If module already has init called, since it is too
    					//late to modify them, and ignore unnormalized ones
    					//since they are transient.
    					if (!mod.inited && !mod.map.unnormalized) {
    						mod.map = makeModuleMap(id);
    					}
    				});

    				//If a deps array or a config callback is specified, then call
    				//require with those args. This is useful when require is defined as a
    				//config object before require.js is loaded.
    				if (cfg.deps || cfg.callback) {
    					context.require(cfg.deps || [], cfg.callback);
    				}
    			},

    			makeShimExports : function(value) {
    				function fn() {
    					var ret;
    					if (value.init) {
    						ret = value.init.apply(global, arguments);
    					}
    					return ret || (value.exports && getGlobal(value.exports));
    				}
    				return fn;
    			},

    			makeRequire : function(relMap,options) {
    				options = options || {};

    				function localRequire(deps,callback,errback) {
    					var id, map, requireMod;

    					if (options.enableBuildCallback && callback && isFunction(callback)) {
    						callback.__requireJsBuild = true;
    					}

    					if (typeof deps === 'string') {
    						if (isFunction(callback)) {
    							//Invalid call
    							return onError(makeError('requireargs', 'Invalid require call'), errback);
    						}

    						//If require|exports|module are requested, get the
    						//value for them from the special handlers. Caveat:
    						//this only works while module is being defined.
    						if (relMap && hasProp(handlers, deps)) {
    							return handlers[deps](registry[relMap.id]);
    						}

    						//Synchronous access to one module. If require.get is
    						//available (as in the Node adapter), prefer that.
    						if (req.get) {
    							return req.get(context, deps, relMap, localRequire);
    						}

    						//Normalize module name, if it contains . or ..
    						map = makeModuleMap(deps, relMap, false, true);
    						id = map.id;

    						if (!hasProp(defined, id)) {
    							return onError(makeError('notloaded', 'Module name "' + id + '" has not been loaded yet for context: ' + contextName + (relMap ? '' : '. Use require([])')));
    						}
    						return defined[id];
    					}

    					//Grab defines waiting in the global queue.
    					intakeDefines();

    					//Mark all the dependencies as needing to be loaded.
    					context.nextTick(function() {
    						//Some defines could have been added since the
    						//require call, collect them.
    						intakeDefines();

    						requireMod = getModule(makeModuleMap(null, relMap));

    						//Store if map config should be applied to this require
    						//call for dependencies.
    						requireMod.skipMap = options.skipMap;

    						requireMod.init(deps, callback, errback, {
    							enabled : true
    						});

    						checkLoaded();
    					});

    					return localRequire;
    				}

    				mixin(localRequire, {
    					isBrowser : isBrowser,

    					/**
    					 * Converts a module name + .extension into an URL path.
    					 * *Requires* the use of a module name. It does not support using
    					 * plain URLs like nameToUrl.
    					 */
    					toUrl : function(moduleNamePlusExt) {
    						var ext, index = moduleNamePlusExt.lastIndexOf('.'), segment = moduleNamePlusExt.split('/')[0], isRelative = segment === '.' || segment === '..';

    						//Have a file extension alias, and it is not the
    						//dots from a relative path.
    						if (index !== -1 && (!isRelative || index > 1)) {
    							ext = moduleNamePlusExt.substring(index, moduleNamePlusExt.length);
    							moduleNamePlusExt = moduleNamePlusExt.substring(0, index);
    						}

    						return context.nameToUrl(normalize(moduleNamePlusExt, relMap && relMap.id, true), ext, true);
    					},

    					defined : function(id) {
    						return hasProp(defined, makeModuleMap(id, relMap, false, true).id);
    					},

    					specified : function(id) {
    						id = makeModuleMap(id, relMap, false, true).id;
    						return hasProp(defined, id) || hasProp(registry, id);
    					}
    				});

    				//Only allow undef on top level require calls
    				if (!relMap) {
    					localRequire.undef = function(id) {
    						//Bind any waiting define() calls to this context,
    						//fix for #408
    						takeGlobalQueue();

    						var map = makeModuleMap(id, relMap, true), mod = getOwn(registry, id);

    						removeScript(id);

    						delete defined[id];
    						delete urlFetched[map.url];
    						delete undefEvents[id];

    						//Clean queued defines too. Go backwards
    						//in array so that the splices do not
    						//mess up the iteration.
    						eachReverse(defQueue, function(args,i) {
    							if (args[0] === id) {
    								defQueue.splice(i, 1);
    							}
    						});

    						if (mod) {
    							//Hold on to listeners in case the
    							//module will be attempted to be reloaded
    							//using a different config.
    							if (mod.events.defined) {
    								undefEvents[id] = mod.events;
    							}

    							cleanRegistry(id);
    						}
    					};
    				}

    				return localRequire;
    			},

    			/**
    			 * Called to enable a module if it is still in the registry
    			 * awaiting enablement. A second arg, parent, the parent module,
    			 * is passed in for context, when this method is overridden by
    			 * the optimizer. Not shown here to keep code compact.
    			 */
    			enable : function(depMap) {
    				var mod = getOwn(registry, depMap.id);
    				if (mod) {
    					getModule(depMap).enable();
    				}
    			},

    			/**
    			 * Internal method used by environment adapters to complete a load event.
    			 * A load event could be a script load or just a load pass from a synchronous
    			 * load call.
    			 * @param {String} moduleName the name of the module to potentially complete.
    			 */
    			completeLoad : function(moduleName) {
    				var found, args, mod, shim = getOwn(config.shim, moduleName) || {}, shExports = shim.exports;

    				takeGlobalQueue();

    				while (defQueue.length) {
    					args = defQueue.shift();
    					if (args[0] === null) {
    						args[0] = moduleName;
    						//If already found an anonymous module and bound it
    						//to this name, then this is some other anon module
    						//waiting for its completeLoad to fire.
    						if (found) {
    							break;
    						}
    						found = true;
    					} else if (args[0] === moduleName) {
    						//Found matching define call for this script!
    						found = true;
    					}

    					callGetModule(args);
    				}

    				//Do this after the cycle of callGetModule in case the result
    				//of those calls/init calls changes the registry.
    				mod = getOwn(registry, moduleName);

    				if (!found && !hasProp(defined, moduleName) && mod && !mod.inited) {
    					if (config.enforceDefine && (!shExports || !getGlobal(shExports))) {
    						if (hasPathFallback(moduleName)) {
    							return;
    						} else {
    							return onError(makeError('nodefine', 'No define call for ' + moduleName, null, [
    								moduleName
    							]));
    						}
    					} else {
    						//A script that does not call define(), so just simulate
    						//the call for it.
    						callGetModule([
    								moduleName, (shim.deps || []), shim.exportsFn
    						]);
    					}
    				}

    				checkLoaded();
    			},

    			/**
    			 * Converts a module name to a file path. Supports cases where
    			 * moduleName may actually be just an URL.
    			 * Note that it **does not** call normalize on the moduleName,
    			 * it is assumed to have already been normalized. This is an
    			 * internal API, not a public one. Use toUrl for the public API.
    			 */
    			nameToUrl : function(moduleName,ext,skipExt) {
    				var paths, syms, i, parentModule, url, parentPath, bundleId, pkgMain = getOwn(config.pkgs, moduleName);

    				if (pkgMain) {
    					moduleName = pkgMain;
    				}

    				bundleId = getOwn(bundlesMap, moduleName);

    				if (bundleId) {
    					return context.nameToUrl(bundleId, ext, skipExt);
    				}

    				//If a colon is in the URL, it indicates a protocol is used and it is just
    				//an URL to a file, or if it starts with a slash, contains a query arg (i.e. ?)
    				//or ends with .js, then assume the user meant to use an url and not a module id.
    				//The slash is important for protocol-less URLs as well as full paths.
    				if (req.jsExtRegExp.test(moduleName)) {
    					//Just a plain path, not module name lookup, so just return it.
    					//Add extension if it is included. This is a bit wonky, only non-.js things pass
    					//an extension, this method probably needs to be reworked.
    					url = moduleName + (ext || '');
    				} else {
    					//A module that needs to be converted to a path.
    					paths = config.paths;

    					syms = moduleName.split('/');
    					//For each module name segment, see if there is a path
    					//registered for it. Start with most specific name
    					//and work up from it.
    					for (i = syms.length; i > 0; i -= 1) {
    						parentModule = syms.slice(0, i).join('/');

    						parentPath = getOwn(paths, parentModule);
    						if (parentPath) {
    							//If an array, it means there are a few choices,
    							//Choose the one that is desired
    							if (isArray(parentPath)) {
    								parentPath = parentPath[0];
    							}
    							syms.splice(0, i, parentPath);
    							break;
    						}
    					}

    					//Join the path parts together, then figure out if baseUrl is needed.
    					url = syms.join('/');
    					url += (ext || (/^data\:|\?/.test(url) || skipExt ? '' : '.js'));
    					url = (url.charAt(0) === '/' || url.match(/^[\w\+\.\-]+:/) ? '' : config.baseUrl) + url;
    				}

    				return config.urlArgs ? url + ((url.indexOf('?') === -1 ? '?' : '&') + config.urlArgs) : url;
    			},

    			//Delegates to req.load. Broken out as a separate function to
    			//allow overriding in the optimizer.
    			load : function(id,url) {
    				req.load(context, id, url);
    			},

    			/**
    			 * Executes a module callback function. Broken out as a separate function
    			 * solely to allow the build system to sequence the files in the built
    			 * layer in the right sequence.
    			 *
    			 * @private
    			 */
    			execCb : function(name,callback,args,exports) {
    				return callback.apply(exports, args);
    			},

    			/**
    			 * callback for script loads, used to check status of loading.
    			 *
    			 * @param {Event} evt the event from the browser for the script
    			 * that was loaded.
    			 */
    			onScriptLoad : function(evt) {
    				//Using currentTarget instead of target for Firefox 2.0's sake. Not
    				//all old browsers will be supported, but this one was easy enough
    				//to support and still makes sense.
    				if (evt.type === 'load' || (readyRegExp.test((evt.currentTarget || evt.srcElement).readyState))) {
    					//Reset interactive script so a script node is not held onto for
    					//to long.
    					interactiveScript = null;

    					//Pull out the name of the module and the context.
    					var data = getScriptData(evt);
    					context.completeLoad(data.id);
    				}
    			},

    			/**
    			 * Callback for script errors.
    			 */
    			onScriptError : function(evt) {
    				var data = getScriptData(evt);
    				if (!hasPathFallback(data.id)) {
    					return onError(makeError('scripterror', 'Script error for: ' + data.id, evt, [
    						data.id
    					]));
    				}
    			}
    		};

    		context.require = context.makeRequire();
    		return context;
    	}

    	/**
    	 * Main entry point.
    	 *
    	 * If the only argument to require is a string, then the module that
    	 * is represented by that string is fetched for the appropriate context.
    	 *
    	 * If the first argument is an array, then it will be treated as an array
    	 * of dependency string names to fetch. An optional function callback can
    	 * be specified to execute when all of those dependencies are available.
    	 *
    	 * Make a local req variable to help Caja compliance (it assumes things
    	 * on a require that are not standardized), and to give a short
    	 * name for minification/local scope use.
    	 */
    	req = requirejs = function(deps,callback,errback,optional) {

    		//Find the right context, use default
    		var context, config, contextName = defContextName;

    		// Determine if have config object in the call.
    		if (!isArray(deps) && typeof deps !== 'string') {
    			// deps is a config object
    			config = deps;
    			if (isArray(callback)) {
    				// Adjust args if there are dependencies
    				deps = callback;
    				callback = errback;
    				errback = optional;
    			} else {
    				deps = [];
    			}
    		}

    		if (config && config.context) {
    			contextName = config.context;
    		}

    		context = getOwn(contexts, contextName);
    		if (!context) {
    			context = contexts[contextName] = req.s.newContext(contextName);
    		}

    		if (config) {
    			context.configure(config);
    		}

    		return context.require(deps, callback, errback);
    	};

    	/**
    	 * Support require.config() to make it easier to cooperate with other
    	 * AMD loaders on globally agreed names.
    	 */
    	req.config = function(config) {
    		return req(config);
    	};

    	/**
    	 * Execute something after the current tick
    	 * of the event loop. Override for other envs
    	 * that have a better solution than setTimeout.
    	 * @param  {Function} fn function to execute later.
    	 */
    	req.nextTick = typeof setTimeout !== 'undefined' ? function(fn) {
    		setTimeout(fn, 4);
    	} : function(fn) {
    		fn();
    	};

    	/**
    	 * Export require as a global, but only if it does not already exist.
    	 */
    	if (!require) {
    		require = req;
    	}

    	req.version = version;

    	//Used to filter out dependencies that are already paths.
    	req.jsExtRegExp = /^\/|:|\?|\.js$/;
    	req.isBrowser = isBrowser;
    	s = req.s = {
    		contexts : contexts,
    		newContext : newContext
    	};

    	//Create default context.
    	req({});

    	//Exports some context-sensitive methods on global require.
    	each([
    			'toUrl', 'undef', 'defined', 'specified'
    	], function(prop) {
    		//Reference from contexts instead of early binding to default context,
    		//so that during builds, the latest instance of the default context
    		//with its config gets used.
    		req[prop] = function() {
    			var ctx = contexts[defContextName];
    			return ctx.require[prop].apply(ctx, arguments);
    		};
    	});

    	if (isBrowser) {
    		head = s.head = document.getElementsByTagName('head')[0];
    		//If BASE tag is in play, using appendChild is a problem for IE6.
    		//When that browser dies, this can be removed. Details in this jQuery bug:
    		//http://dev.jquery.com/ticket/2709
    		baseElement = document.getElementsByTagName('base')[0];
    		if (baseElement) {
    			head = s.head = baseElement.parentNode;
    		}
    	}

    	/**
    	 * Any errors that require explicitly generates will be passed to this
    	 * function. Intercept/override it if you want custom error handling.
    	 * @param {Error} err the error object.
    	 */
    	req.onError = defaultOnError;

    	/**
    	 * Creates the node for the load command. Only used in browser envs.
    	 */
    	req.createNode = function(config,moduleName,url) {
    		var node = config.xhtml ? document.createElementNS('http://www.w3.org/1999/xhtml', 'html:script') : document.createElement('script');
    		node.type = config.scriptType || 'text/javascript';
    		node.charset = 'utf-8';
    		node.async = true;
    		return node;
    	};

    	/**
    	 * Does the request to load a module for the browser case.
    	 * Make this a separate function to allow other environments
    	 * to override it.
    	 *
    	 * @param {Object} context the require context to find state.
    	 * @param {String} moduleName the name of the module.
    	 * @param {Object} url the URL to the module.
    	 */
    	req.load = function(context,moduleName,url) {
    		var config = (context && context.config) || {}, node;
    		if (isBrowser) {
    			//In the browser so use a script tag
    			node = req.createNode(config, moduleName, url);

    			node.setAttribute('data-requirecontext', context.contextName);
    			node.setAttribute('data-requiremodule', moduleName);

    			//Set up load listener. Test attachEvent first because IE9 has
    			//a subtle issue in its addEventListener and script onload firings
    			//that do not match the behavior of all other browsers with
    			//addEventListener support, which fire the onload event for a
    			//script right after the script execution. See:
    			//https://connect.microsoft.com/IE/feedback/details/648057/script-onload-event-is-not-fired-immediately-after-script-execution
    			//UNFORTUNATELY Opera implements attachEvent but does not follow the script
    			//script execution mode.
    			if (node.attachEvent &&
    			//Check if node.attachEvent is artificially added by custom script or
    			//natively supported by browser
    			//read https://github.com/jrburke/requirejs/issues/187
    			//if we can NOT find [native code] then it must NOT natively supported.
    			//in IE8, node.attachEvent does not have toString()
    			//Note the test for "[native code" with no closing brace, see:
    			//https://github.com/jrburke/requirejs/issues/273
    			!(node.attachEvent.toString && node.attachEvent.toString().indexOf('[native code') < 0) && !isOpera) {
    				//Probably IE. IE (at least 6-8) do not fire
    				//script onload right after executing the script, so
    				//we cannot tie the anonymous define call to a name.
    				//However, IE reports the script as being in 'interactive'
    				//readyState at the time of the define call.
    				useInteractive = true;

    				node.attachEvent('onreadystatechange', context.onScriptLoad);
    				//It would be great to add an error handler here to catch
    				//404s in IE9+. However, onreadystatechange will fire before
    				//the error handler, so that does not help. If addEventListener
    				//is used, then IE will fire error before load, but we cannot
    				//use that pathway given the connect.microsoft.com issue
    				//mentioned above about not doing the 'script execute,
    				//then fire the script load event listener before execute
    				//next script' that other browsers do.
    				//Best hope: IE10 fixes the issues,
    				//and then destroys all installs of IE 6-9.
    				//node.attachEvent('onerror', context.onScriptError);
    			} else {
    				node.addEventListener('load', context.onScriptLoad, false);
    				node.addEventListener('error', context.onScriptError, false);
    			}
    			node.src = url;

    			//For some cache cases in IE 6-8, the script executes before the end
    			//of the appendChild execution, so to tie an anonymous define
    			//call to the module name (which is stored on the node), hold on
    			//to a reference to this node, but clear after the DOM insertion.
    			currentlyAddingScript = node;
    			if (baseElement) {
    				head.insertBefore(node, baseElement);
    			} else {
    				head.appendChild(node);
    			}
    			currentlyAddingScript = null;

    			return node;
    		} else if (isWebWorker) {
    			try {
    				//In a web worker, use importScripts. This is not a very
    				//efficient use of importScripts, importScripts will block until
    				//its script is downloaded and evaluated. However, if web workers
    				//are in play, the expectation that a build has been done so that
    				//only one script needs to be loaded anyway. This may need to be
    				//reevaluated if other use cases become common.
    				importScripts(url);

    				//Account for anonymous modules
    				context.completeLoad(moduleName);
    			} catch (e) {
    				context.onError(makeError('importscripts', 'importScripts failed for ' + moduleName + ' at ' + url, e, [
    					moduleName
    				]));
    			}
    		}
    	};

    	function getInteractiveScript() {
    		if (interactiveScript && interactiveScript.readyState === 'interactive') {
    			return interactiveScript;
    		}

    		eachReverse(scripts(), function(script) {
    			if (script.readyState === 'interactive') {
    				return (interactiveScript = script);
    			}
    		});
    		return interactiveScript;
    	}

    	//Look for a data-main script attribute, which could also adjust the baseUrl.
    	if (isBrowser && !cfg.skipDataMain) {
    		//Figure out baseUrl. Get it from the script tag with require.js in it.
    		eachReverse(scripts(), function(script) {
    			//Set the 'head' where we can append children by
    			//using the script's parent.
    			if (!head) {
    				head = script.parentNode;
    			}

    			//Look for a data-main attribute to set main script for the page
    			//to load. If it is there, the path to data main becomes the
    			//baseUrl, if it is not already set.
    			dataMain = script.getAttribute('data-main');
    			if (dataMain) {
    				//Preserve dataMain in case it is a path (i.e. contains '?')
    				mainScript = dataMain;

    				//Set final baseUrl if there is not already an explicit one.
    				if (!cfg.baseUrl) {
    					//Pull off the directory of data-main for use as the
    					//baseUrl.
    					src = mainScript.split('/');
    					mainScript = src.pop();
    					subPath = src.length ? src.join('/') + '/' : './';

    					cfg.baseUrl = subPath;
    				}

    				//Strip off any trailing .js since mainScript is now
    				//like a module name.
    				mainScript = mainScript.replace(jsSuffixRegExp, '');

    				//If mainScript is still a path, fall back to dataMain
    				if (req.jsExtRegExp.test(mainScript)) {
    					mainScript = dataMain;
    				}

    				//Put the data-main script in the files to load.
    				cfg.deps = cfg.deps ? cfg.deps.concat(mainScript) : [
    					mainScript
    				];

    				return true;
    			}
    		});
    	}

    	/**
    	 * The function that handles definitions of modules. Differs from
    	 * require() in that a string for the module should be the first argument,
    	 * and the function to execute after dependencies are loaded should
    	 * return a value to define the module corresponding to the first argument's
    	 * name.
    	 */
    	define = function(name,deps,callback) {
    		var node, context;

    		//Allow for anonymous modules
    		if (typeof name !== 'string') {
    			//Adjust args appropriately
    			callback = deps;
    			deps = name;
    			name = null;
    		}

    		//This module may not have dependencies
    		if (!isArray(deps)) {
    			callback = deps;
    			deps = null;
    		}

    		//If no name, and callback is a function, then figure out if it a
    		//CommonJS thing with dependencies.
    		if (!deps && isFunction(callback)) {
    			deps = [];
    			//Remove comments from the callback string,
    			//look for require calls, and pull them into the dependencies,
    			//but only if there are function args.
    			if (callback.length) {
    				callback.toString().replace(commentRegExp, '').replace(cjsRequireRegExp, function(match,dep) {
    					deps.push(dep);
    				});

    				//May be a CommonJS thing even without require calls, but still
    				//could use exports, and module. Avoid doing exports and module
    				//work though if it just needs require.
    				//REQUIRES the function to expect the CommonJS variables in the
    				//order listed below.
    				deps = (callback.length === 1 ? [
    					'require'
    				] : [
    						'require', 'exports', 'module'
    				]).concat(deps);
    			}
    		}

    		//If in IE 6-8 and hit an anonymous define() call, do the interactive
    		//work.
    		if (useInteractive) {
    			node = currentlyAddingScript || getInteractiveScript();
    			if (node) {
    				if (!name) {
    					name = node.getAttribute('data-requiremodule');
    				}
    				context = contexts[node.getAttribute('data-requirecontext')];
    			}
    		}

    		//Always save off evaluating the def call until the script onload handler.
    		//This allows multiple modules to be in a file without prematurely
    		//tracing dependencies, and allows for anonymous module support,
    		//where the module name is not known until the script onload event
    		//occurs. If no context, use the global queue, and get it processed
    		//in the onscript load callback.
    		(context ? context.defQueue : globalDefQueue).push([
    				name, deps, callback
    		]);
    	};

    	define.amd = {
    		jQuery : true
    	};

    	/**
    	 * Executes the text. Normally just uses eval, but can be modified
    	 * to use a better, environment-specific call. Only used for transpiling
    	 * loader plugins, not for plain JS modules.
    	 * @param {String} text the text to execute/evaluate.
    	 */
    	req.exec = function(text) {
    		/*jslint evil: true */
    		return eval(text);
    	};

    	//Set up with config info.
    	req(cfg);
    }(this));