Moving Extensions into its own files our of Game Scene and Adding accessor types release in Beta 4 to functions in game scene
Merge pull request #15 from jocelynlih/paul

Performance improvements:
Merging with Master
Merge pull request #13 from jocelynlih/ankur-refactoring

Moving Extensions into its own files our of Game Scene and Adding accessor types to Functions
Sketch rendering is now done on a per-sprite level with child sprites that contain sketches. They need to be animated, which will be next. Wanted to get this stuff in so I can sync with master.
Merged with master