Tooltips for flash and starling

You can create an instance of TooltipSource class in flash CC to provide
a default style for your tooltips. getTextWidth() and height functions
are added to static extentions. Target object reference is added to
TouchManager events. Fixed an initializer bug with globalToLocal in
starling. Fixed a starling textfields convertion bug.

Currently distanceFromMouse variable do not work propertly in tooltips.