Added support for callbacks and sound. (Callbacks not yet supported in JS)
Adds support for animated skew property
Added support for JS callbacks
Fixed support for JS callbacks from timeline
Removed debug prints
Adds support for animating Flash style skews
Fixes bug with timing of channel keyframes
Adds support for custom TTFs in CocosPlayer
Fixed issues with sub animations not playing back correctly when animated in main timeline
Cleaned up code
Fix a retina scaling issue