added event dispatch information to class documentation
disposing old texture when text changes (closes #95)
added info about 'Event.ROOT_CREATED'
removed old commentary
minor documentation updates
allowing to enable 'showStats' before Starling is initialized
added size check on bitmap font
fixed drawing errors with certain scale factors
simplified fragment program when quad is not tinted, which greatly improves performance on iPad 1
fixed that blend modes were sometimes not applied when using QuadBatch class directly
fixed alpha value of children in flattened sprite
fixed logic for tinted/untinted fragment programs
renamed 'alpha' parameters to 'parentAlpha' in render methods
updated documentation
added namespace 'starling_internal', moved QuadBatch class to 'display' package and 'TouchProcessor' & 'TouchMarker' classes to 'core'.
FDT compatibility changes
fixed that alpha value was ignored in some situations
avoiding antialiasing-issues with persistent render textures (closes #98)
aborting text layout when string is null or empty
fixed error when text contained empty lines