Class for loading a [page:CubeTexture CubeTexture]. This uses the [page:ImageLoader] internally for loading files.
			[example:webgl_materials_cubemap materials / cubemap]
			[example:webgl_materials_cubemap_balls_reflection materials / cubemap / balls / reflection]
			[example:webgl_materials_cubemap_balls_refraction materials / cubemap / balls / refraction]
			[example:webgl_materials_cubemap_dynamic materials / cubemap / dynamic]
			[example:webgl_materials_cubemap_refraction materials / cubemap / refraction]
		
var scene = new THREE.Scene();
scene.background = new THREE.CubeTextureLoader()
	.setPath( 'textures/cubeMaps/' )
	.load( [
				'px.png',
				'nx.png',
				'py.png',
				'ny.png',
				'pz.png',
				'nz.png'
			] );
		
		
		[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 urls] — array of 6 urls to images, one for each side of the CubeTexture.
		The urls should be specified in the following order: pos-x, neg-x, pos-y, neg-y, pos-z, neg-z.
		They can also be [link:https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs Data URIs].
		Note that, by convention, cube maps are specified in a coordinate system in which positive-x is to the right
		when looking up the positive-z axis -- in other words, using a left-handed coordinate system.
		Since three.js uses a right-handed coordinate system, environment maps used in three.js will have pos-x and neg-x swapped.
		[page:Function onLoad] — Will be called when load completes. The argument will be the loaded [page:Texture texture].
		[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 when load errors.
		
Begin loading from url and pass the loaded [page:CubeTexture texture] to onLoad.
[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]