Don't track the mouse in mirror mode.
Set the head scale for other avatars.
Merge pull request #1267 from ey6es/master

Couple of tiny fixes: head scales on remote avatars, disable mouse eye tracking in mirror mode.
Fix for pupil dilation on Ryan's face.
Added a slider in the preferences to control the amount of Faceshift eye
deflection.
Merge pull request #1268 from ey6es/master

Fix for pupil dilation on Ryan's face.
fix to crash on deleteNotify
Merge pull request #1270 from ZappoMan/bugfixes

fix to crash on deleteNotify