fix event handling.
Rewrite fix
Merge pull request #612 from rfuerst87/event-handler-fix

fix event handling.
able to change the inputTarget
update changelog
make sure the end events are emitted as the final events. fix #616
when only one touch is on the screen the whole process can be simplified
refactor
fix deltaXY issue
fix deltaXY issue
fix deltaXY issue
jquery has its own place now
improvements
refactor for inputTarget
refactor for inputTarget
dev build
fix rotate
new animations for tap/doubletap
nicer animations
improved velocity calculation #620