Classes
 ClassDescription
 DisplayObjectLoader Serves as the base class for SWFLoader and ImageLoader.
 LoaderCore Serves as the base class for GreenSock loading tools like LoaderMax, ImageLoader, XMLLoader, SWFLoader, etc.
 LoaderItem Serves as the base class for all individual loaders (not LoaderMax) like ImageLoader, XMLLoader, SWFLoader, MP3Loader, etc.