Initial comment for graphics.dart + webGL warning from CHANGELOG.
Add some basic documentation to the Graphics object.

Should be enough to avoid any confusion about order of operations or
WebGL support, for instance.
Document DisplayObject.applyCache.

It's tangetically related to WebGL support referenced in the Graphics
object.
Better grammar.
Merge pull request #62 from radicaled/graphics_doc

Basic Graphics class documentation
Enable sound on IEMobile/10.0
Merge pull request #64 from xavierhainaux/IEMobileAudio

Enable sound on IEMobile/10.0
Update AUTHORS.md

Added Xavier Hainaux!
Update AUTHORS.md
Update AUTHORS.md
Fixed bug in Mask.shape
Fixed Canvas2D CompositeOperation
Minor optimization for dart2js
Version 0.9.0+1
Try to fix WebGL fallback on iOS
Version 0.9.0+2
Cleanup and started work on frame buffer
Fixed AlphaMaskFilter
Make all mask methods public
Minor optimization for non growable list

If dart2js gets a little bit smarter we get much better code in the
future.