Unify the Event API

[calebmcelroy]

This introduces beforeTouchStart and beforeDoubleClick, and deprecates onTouch and onDoubleClick.

Both beforeTouchStart and beforeDoubleClick allow returning true to ignore the event, similar to beforeWheel and beforeMouseDown, thus unifying the event API. This change is backward compatible, as both onTouch and onDoubleClick still support the original behavior.

[calebmcelroy]

This is a great package thanks so much your work on this!