Moved all the avatar bits to their own subdirectory.
Merge branch 'master' of https://github.com/worklist/hifi into pointy

Conflicts:
	interface/src/Application.h
Working on face rendering as point cloud.
Merge branch 'master' of https://github.com/worklist/hifi into pointy
Working on mesh rendering for faces.
Merge branch 'master' of https://github.com/worklist/hifi into pointy

Conflicts:
	interface/src/avatar/Head.cpp
More work on face points.
Merge branch 'master' of https://github.com/worklist/hifi into pointy
Merge branch 'master' of https://github.com/worklist/hifi into pointy
Track features on face, add a mode to render just key points.
Merge branch 'master' of https://github.com/worklist/hifi into pointy
Removed keypoint stuff, fixed stupidity leading to fringed edges (was
linearly interpolating the missing values).
Working on integrating LibVPX for VP8 (9?) encoding.
Working on transmitting and receiving the face video.
Most of the way towards working video encoding.
Now able to stream depth data.
Added libvpx library for OS X.
Merge branch 'master' of https://github.com/worklist/hifi into pointy

Conflicts:
	interface/src/Application.h
	interface/src/Audio.h
	interface/src/Webcam.cpp
Removed unused variable, fixed shader comments.
The depth texture needs nearest neighbor filtering.