Improved toy ball, JS calls for palm position, concertCamera.js

This implementation of vertlet hair (implemented as a bunch of constants and init/sim/render routines inside Avatar class is temporary.  I will now refactor to remove this hair code to it's own class, so that we can attach hair to particles, or make cloth for avatars, or attach at other points, etc. 
Will pull for Ryan to test, but I think you might want a += here.
I noticed that if I rotate on myself the hairs don't go in the right direction.
Changing that to a += seemed to fix it.