fix voxel nodes to work with new UUID format
fixed comment
Merge pull request #1079 from birarda/assignment

add local node information to assignments JSON
fixed comment
Merge pull request #1080 from ZappoMan/voxelnode_memory_savings

fix voxel nodes to work with new UUID format
add ping/reply to assignment-client servers
don't send audio to nodes who don't have an active socket
don't attempt to send in UDPSocket with NULL destAddress