now returning Program3D object in 'Starling.registerProgram()'
small simplification
Merge branch 'master' of github.com:PrimaryFeather/Starling-Framework
made 'redraw' method of TextField public
added 'autoSize' property to TextField class
raised AIR version to 3.7
fixed native textfield padding value
added missing redraw check in getBounds method
renamed TextFieldAutoSize constants
removed redundant code
added 'Tween.progress' property (closes #321)
added new autoSize mode: 'BOTH_DIRECTIONS' (refs #272)