add label support to SPMovieClip
added 'region' to SPSubTexture
added 'snapshot' methods to SPContext
comment fix
added subscripting and 'children' property to SPDisplayObjectContainer
added SPColor functions, deprecated SP_COLOR macros

* swift can’t import function macros, so regular functions are required
for import
added 'trimQuadBatches' to SPRenderSupport
added 'nextTween' and 'tweenWithTarget' methods
added 'debugQuickLookObject' to SPTexture

* can now view textures in the debugger
indent fix