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
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
Merge branch 'master' of https://github.com/worklist/hifi into voxel_stats