have animation server set an appropriate PPS based on it's voxel edit messages
fixed PPS bugs in threaded version of PacketSender class
added various render mode options, including voxels as points
tighten up mutex locks to keep at 60 fps
cleanup code for PR
Merge pull request #1024 from ZappoMan/voxel_render_modes

Voxel Rendering Improvements - make it run at 60fps