Extended the flash.display.MovieClip handling functionality to let users create sprites from flash.display.MovieClip subclasses and flash.display.MovieClip instances using classes, instances, or string names that resolve to classes.
adding an asset caching system to the tile system so bitmaps and textures can be reused rather than eating up memory with duplicate textures/bitmaps etc.  This relies on the developer to pass Bitmap instances in the tile array (not just classes) so they can be recognized as the same instance
Merge pull request #130 from mcapraro/master

Extended the flash.display.MovieClip handling functionality to let users...