basic ParticleTree and ParticleTreeElement classes
added some scripts, latest particle server work
Merge branch 'master' of https://github.com/worklist/hifi into more_on_particle_server

Conflicts:
	libraries/particle-server/CMakeLists.txt
	libraries/particle-server/src/ParticleServer.h
	libraries/particles/src/ParticleTree.cpp
first cut at getting voxel server based on octree server
removing dead code
removed all dead VoxelServer code, now mostly handled by OctreeServer
clean up server name
actually added the octree-server base class library
removed scripts
tweak
added CMakeLists.txt
added basic particle server renamed voxel packet names to fit standard
added basic particle server renamed voxel packet names to fit standard
tweak to cause rebuild
fix cmake
attempt to fix build buster
fix build buster
add --particleServerConfig to domain server
Merge pull request #1312 from ZappoMan/more_on_particle_server

First cut at basic Particle Server
merge with upstream/master