Merge pull request #2545 from ZappoMan/bugfixes

Fixes Voxel Server "stop sending" issue
Couple of quick fixes: reset the skeleton joints when space is pressed as a
last resort to fix broken IK, don't render display names at the origin if
we don't have a skeleton model.
Merge pull request #2548 from ey6es/master

Couple of quick fixes: reset the skeleton joints when space is pressed a...
make sure VoxelServer and ParticleServer are in Agent interest list
added back use of nodeWithUUID() instead of sharedpointer
Merge pull request #2550 from birarda/master

fix for Agent interest list
Merge pull request #2555 from ZappoMan/backtotrylockanduuid

added back use of nodeWithUUID() instead of sharedpointer