* TouchScrollStrategy: add isScrolling, isOverscrolling; reject high frequency mousewheel input; add getOverscrollBounds.
* TouchScrollStrategy: add isScrolling, isOverscrolling; reject high frequency mousewheel input; add getOverscrollBounds.

bright-sparks/enyo,mcanthony/enyo,onecrayon/enyo,enyojs/enyo,beni55/enyo,enyojs/enyo,kustomzone/enyo,PKRoma/enyo,wikieswan/enyo,mcanthony/enyo,airspringsoftware/enyo,zefsolutions/enyo,soapdog/enyo,zefsolutions/enyo,onecrayon/enyo,soapdog/enyo,wikieswan/enyo,airspringsoftware/enyo,bright-sparks/enyo,kustomzone/enyo,beni55/enyo,PKRoma/enyo