Added PositionerImmovableRelative
Fix issues with rotated immovable

NOTE: this assumes that AE core has getRotation() method
added to Transformation
Removed PositionerNormal; renamed PositionerSmart to PositionerSceneRelative
Switch to custom method for calculating Transformation's rotation
Added Swing widget with all it's friends
Fixed wrong distance calculation for Swing animation
Fixed some copyright comments
Minor refactoring (using this when accessing fields)
Added getText() method to Swing
Added some comments; minor refactoring; changed Swing package
Added Button widget
Removed debug log
Added setTouchAreaBindingOnActionMoveEnabled and setTouchAreaBindingOnActionDownEnabled
Window's onSceneTouchEvent was using Scene, not it's own coordinates
Removed some dead code