Merge branch 'master' of https://github.com/worklist/hifi
Refactor/Cleanup serial interface to use vectors, correct rotation axes.  Added translation estimation for the head.
Merge branch 'master' of https://github.com/worklist/hifi
Rename serialPort to serialHeadSensor, added passing of lean to eyeOffset
gyro look controls head offset on/off
Merge branch 'master' of https://github.com/worklist/hifi
Merge branch 'master' of https://github.com/worklist/hifi
merge conflict fix
merge fix
Merge branch 'master' of https://github.com/worklist/hifi
Merge fixes for brad, reversed pitch direction to correct mouse look
Merge pull request #476 from PhilipRosedale/master

Cleanup of serial interface code, added translation estimate