added collision code for avatar (not operational yet). and some cleanup.
Merge remote-tracking branch 'upstream/master'
Merge pull request #115 from PhilipRosedale/master

First commit fix gyros - local render now works.
Merge remote-tracking branch 'upstream/master'
changes from Philip's push - I assume
Added 'gyro look' option to have gyro drive your render yaw, added render menu.
Merge remote-tracking branch 'upstream/master'