Revert directionality back to DIRECTION_X, etc in MouseSync
Rename input/output -> _eventInput/_eventOutput
better options management in syncs
updated jsDoc
Update yuiDOC and renamed event input/output
Update formatting
Update _now method calles Date.now
Update removed event.preventDefault from touchTracker's start
Update yuiDOC in mouse and touch syncs
Rename output to _eventOutput in inheritors of TwoFingerSync
Fix bugs in PinchSync
Fix scale on ScaleSync, rename distance -> displacement
Add directionality to GenericSync
removed debugger statement
minor fixes