Class for loading [page:AnimationClip AnimationClips] in JSON format. This uses the [page:FileLoader] internally for loading files.
		// instantiate a loader
		var loader = new THREE.AnimationLoader();
		// load a resource
		loader.load(
			// resource URL
			'animations/animation.js',
			// onLoad callback
			function ( animations ) {
				// animations is an array of AnimationClips
			},
			// onProgress callback
			function ( xhr ) {
				console.log( (xhr.loaded / xhr.total * 100) + '% loaded' );
			},
			// onError callback
			function ( err ) {
				console.log( 'An error happened' );
			}
		);
		
		
		[page:LoadingManager manager] — The [page:LoadingManager loadingManager] for the loader to use. Default is [page:LoadingManager THREE.DefaultLoadingManager].
		Creates a new [name].
		
See the base [page:Loader] class for common properties.
See the base [page:Loader] class for common methods.
		[page:String url] — the path or URL to the file. This can also be a
			[link:https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs Data URI].
		[page:Function onLoad] — Will be called when load completes. The argument will be the loaded [page:AnimationClip animation clips].
		[page:Function onProgress] — Will be called while load progresses. The argument will be the XMLHttpRequest instance, which contains .[page:Integer total] and .[page:Integer loaded] bytes.
		[page:Function onError] — Will be called if load errors.
		Begin loading from url and pass the loaded animation to onLoad.
		
		[page:JSON json] — required
		Parse the JSON object and return an array of animation clips. Individual clips in the object will
		be parsed with [page:AnimationClip.parse].
		
[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]