The change is in response to issue #74

[kgcorner]

The commit removes call evt.preventDefault() from the touchmoveWindow function as this call will be ignored as per the below feature request and the screen stays scrollable. https://chromestatus.com/feature/5093566007214080 Screen scrolling can be stopped by using the callback method onDragStart and onDrag by adding and removing CSS property "overflow:hidden;" on the body tag