Starting a TextureAtlas class
Added render methods
Image updated for blitting or using an AtlasRegion
MaskedPixel: Image checked if a BitmapData is an AtlasRegion
TextureAtlas renders at end of World.render; Emitter/Image rendering improvement
Backdrop can use AtlasRegions, emitter example can render 3000 particles!
Backdrop width/height fix for flash
Simplified Image flipped function
Merge branch 'master' into TextureAtlas
Merge branch 'master' into TextureAtlas

Conflicts:
	examples/project.nmml
Fixed TextureAtlas scaling issues, rendering in Engine instead of World
Adding TextureAtlas graphic
Removing HXP.sprite from the DisplayList
Added double tap capability to DemoWorld
Engine width/height will use stage values when 0