Compute the bone radii from the vertices.  It's more error-prone than I
expected, but it more or less works.
Attempting to rotate longitudinally at elbow, rather than wrist.
That didn't really help.  What did help was simply ignoring the wrist
constraints.
Working on testing the Leap/Hydra hands against the avatar body.
Merge branch 'master' of https://github.com/worklist/hifi
Skip the hands' parents as well as the hands themselves.
Add a scale factor to bone radii.
Missed a scale multiplier.
Merge pull request #1322 from birarda/qt-for-portaudio

replace PortAudio with QAudioInput and QAudioOutput
Merge pull request #1325 from birarda/qt-for-portaudio

audio spacing cleanup and garbled audio fix
Don’t render collision if not own avatar,  don’t check for collisions with voxel tree if not me.
Merge branch 'master' of https://github.com/worklist/hifi
don't use static packets in AvatarMixer
reset buffer pointers in between sending to nodes
Option to render collision proxies, more general avatar penetration test, fix
for meshes with only one joint influence.
Merge pull request #1326 from birarda/master

reset pointers between packet sends in AvatarMixer
Test hand against other avatars.
Merge branch 'master' of https://github.com/worklist/hifi
hook audio loudness back to QAudioInput
Render the palm collision proxies.