Merge changes I843fd9ef,Ife0a5721,I18b28a3a,I4439342c,Id8b870b6

* changes:
  Prevent entries with identical times
  Refactor VelocityTracker_test
  Use vector in VelocityTracker_test
  Refactor VelocityTracker_test
  Initialize PointerCoords in input tests