Add "Leap Motion on HMD" developer menu option
Configure Leap controller per HMD option when controller is created
Don't calibrate avatar for Leap Motion if mounted on HMD
Reference camera object rather than copy it
Update camera object's position and orientation with actual Rift values
Position and orient hands when using Leap on HMD
Merge pull request #3517 from ctrlaltdavid/20048

CR for Job #20048 - Leap - Make leapHands.js work with Leap-on-Rift