fixed MovieClip docs, contained outdated event info
fixed that ADDED_TO_STAGE event was not dispatched in some situations (closes #437, refs #426)
not calling 'advanceTime' any longer when context is lost (closes #430)

Previously, I only avoided 'render' calls; however, there's also normal user-code that will fail while the context is invalid (e.g. creating a texture). So I shouldn't call any user-code before the context is restored.
now making sure that the correct Starling instance is used when creating assets (closes #433)
now pinning down the starling instance only on 'loadQueue'; added more documentation (refs #433)
fixed wrong method name in API docs
added support for rotated SubTextures (closes #86)
making sure 'mTextBounds' is not null when text field is restored after context loss (closes #453)