Merge pull request #1285 from ey6es/master

Treat pitchFromTouch more like yawFromTouch, persist mouse pitch.
Merge pull request #1286 from ey6es/master

When Faceshift isn't connected, apply the audio-based blinking and brow/...
Send an explicit kill request to the avatar mixer (which will pass it along to
the other clients) when we exit.