remove unused cruft from Model class API
Model now knows its bounding radius
Adding per-palm penetration accumulator
Hands can collide with avatar head again
Merge upstream/master' into shapes branch
Merge upstream/master

Conflicts:
	interface/src/avatar/MyAvatar.cpp
degrees instead of radians for head lean deltas
Merge upstream master into "shapes" project
fixing signed/unsigned comparison
improved index sanity checking
merge upstream/master into "shapes" project

Conflicts:
	interface/src/avatar/MyAvatar.cpp
	interface/src/avatar/SkeletonModel.cpp
	interface/src/avatar/SkeletonModel.h
	libraries/avatars/src/HandData.h
	libraries/shared/src/SharedUtil.h
Merge branch 'cleanup' into 'shapes'
datalength sanity checking for AvatarData packet
QMap is not used by AvatarData
remove mixer cutoff strategy for testing
Merge pull request #2419 from birarda/audio-scaling

remove mixer cutoff strategy for testing
fix editVoxels.js mouse clicking
output number of no reply domain checkins when finished
Merge pull request #2421 from birarda/audio-scaling

output number of no reply checkins when finished
Merge pull request #2420 from ZappoMan/bugfixes

fix editVoxels.js mouse clicking