First commit to re-enable gyros, removed various old head_mirror variables, now use 'lookingInMirror', etc.   Local gyros now correctly drive own head.
Avatar head rotation, audio loudness (for facial animation) and hand state (grabbing or not) now sent in broadcast data.
Fixed :: prefix for local variables
Fixes from brad's review
One... last.... const....
Merge pull request #115 from PhilipRosedale/master

First commit fix gyros - local render now works.