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
Make sure we don't hear back from replies after we've cleared them.
Improved rotation computation.
Basic sharing of the avatar voxel URLs.
Don't restart the download when we're given the same URL.
Fix for URL decoding.
Merge pull request #489 from ey6es/master

Voxel URL sharing between avatars, tweak to rotation computations, fix for null replies.