[#521] Fix regexp for calculating top position with useTransform:false
fix for Android < 4.2.2 (#441 #472)
fix scrollend event firing twice (#535)
fix scrollend not firing correctly with useTransition:false
Merge branch 'master' of https://github.com/Fodoj/iscroll into Fodoj-master

Conflicts:
	dist/iscroll-lite-min.js
	dist/iscroll-min.js
	dist/iscroll-probe-min.js
	dist/iscroll-zoom-min.js
5.0.7
support for onwheel event
fixed probe dragging the scrollbar (#493)