Zingtouch Versions Save

• Fixes custom expand events not working
• Swipe: Adds duration and distance to event detail

Fixes #22 , missing fn param

Disallows chrome 55+ from using pointer events to avoid buggy feedback #15

Fixes an issue where custom gestures were being reassigned an id every time bind() was called. The last bound element would be the only element who is aware of the new assignment. #11

• Version bump to overwrite an issue with an unreferenced build on npm #9
• Adds a file header to the unminified and minified builds.

Extended the Rotate gesture's functionality to use one input instead of two. The pivot point is calculated at the center point of the target element, to which the gesture is bound to. One-finger rotate is usable on both desktop and touch capable devices. See http://codepen.io/zingchart/pen/GqWVww