First commit with initial Balls class for avatar sphere cloud
Merge branch 'master' of https://github.com/worklist/hifi

Conflicts:
	interface/src/Avatar.cpp
	interface/src/Avatar.h
Added constant to turn OFF avatar BALLS testing
Added balls class
Merge pull request #150 from PhilipRosedale/master

Added balls class for avatar simulation, removed particles class.
Style tweaks: preface privates with underscore, capitalize enum members.
fix otherAgent iterator in audio-mixer main
Merge pull request #151 from birarda/audio

fix for other agent iterator in audio mixer
some spacing cleanup in Audio class
Rather than creating a thread to read datagrams, just set the socket to
nonblocking mode and check it before simulating.  This addresses one aspect
of the lack of synchronization on AgentList, but there are other issues...
correct yaw sent to audio-mixer in Audio
make the absolute head yaw getter const
Merge pull request #152 from birarda/audio

send correct avatar yaw to the audio mixer
Merge branch 'master' of https://github.com/worklist/hifi
correct the sign of the absolute head yaw sent to avatar mixer
Merge pull request #153 from birarda/audio

correct the sign of the absolute head yaw
Merge branch 'master' of https://github.com/worklist/hifi
How'd those tabs get in there?
Merge pull request #156 from ey6es/master

Style fixes to chat code, and moved packet reading to main thread to fix synchronization issues.
Merge branch 'master' of git://github.com/worklist/hifi into 19165

Conflicts:
	interface/src/Audio.cpp