Remove MotionDriver.
Fix GCC warning (string split across lines).
Pruning more avatar bits.
Merge branch 'master' of https://github.com/highfidelity/hifi into debone
Scooping out more head bits.
Merge branch 'master' of https://github.com/highfidelity/hifi into debone
Removed joints from avatar state messages.
Removed unused resources.
Removed a couple more resources.
Merge branch 'master' of https://github.com/highfidelity/hifi into debone
Merge pull request #1565 from ey6es/debone

More code removal: face rendering, joints in avatar state messages, etc.