small 'Quad.set color' optimization (refs #424)
avoiding multiple dispatching of 'addedTo'- and 'removedFromStage' events (closes #426)
new parameter 'transparent' on 'stage.drawToBitmapData' (closes #427)
raised AIR version to 3.9
removed internal closure in 'draw' method to avoid GC issues (closes #417)

Thanks to Jonathan Hart for the fix!
added some information about profile limitations of 'Stage.drawToBitmapData' (refs #427)
'AssetManager.enqueueWithName' now also supports File instances
Merge branch 'master' of https://github.com/PrimaryFeather/Starling-Framework

Conflicts:
	starling/src/starling/display/DisplayObject.as