made transition methods protected (closes #207)
added filters package description
added option to ignore mipmaps (closes #209)
Merge branch 'master' of github.com:PrimaryFeather/Starling-Framework
removed obsolete imports
fixed Tween constructor parameter documentation
now allowing direct modification of viewPort rectangle (closes #197)
added 'Juggler.contains' method (refs #198)
added 'nativeWidth/Height' and 'root' properties to Texture classes
added 'scissorRect' property to RenderSupport class and using it in fragment filter

This allows the scissor rect to be used in combination with filters.
Merge branch 'master' of git://github.com/PrimaryFeather/Starling-Framework
added some api documentation
added support for async loading of ATF textures (closes #158)
hiding two methods from asdoc output
added (private) 'contextValid' property
added RectangleUtil
no more filtering of objects that are outside the stage bounds
now using hand cursor on TouchSheet
Added a removeEventListener in the onAddedToStage method.
Merge pull request #215 from FrancescoMaisto/patch-1

Added a removeEventListener in the onAddedToStage method.