clean up of particle system
Merge remote-tracking branch 'upstream/master' into particles
removed deprecated code
more clean up
more clean up of particle system
cleaned up some compiler warnings and constants
Merge pull request #706 from birarda/master

switch stars file URL to non-SSL
Merge pull request #705 from ZappoMan/bug_fixes

cleaned up some compiler warnings and constants
Merge pull request #704 from Ventrella/particles

more code cleanup
Gyros don't move view for small head movements
fixed crash
Merge pull request #708 from ZappoMan/bug_fixes

fixed crash
Merge pull request #709 from PhilipRosedale/gyroTweaks

Gyros don't move view for small head movements
don't not kill NODE_TYPE_VOXEL_SERVER in removeSilentNodes