am 202a6734: am 8acdb201: Added TransformGestureDetector (still in progress) Modified VelocityTracker to track multiple pointers Added TransformTest

Merge commit '202a6734fd39289257955d404edf7a1165f6e480'

* commit '202a6734fd39289257955d404edf7a1165f6e480':
  Added TransformGestureDetector (still in progress)