Add speed brakes for better flying/walking
Revert "link STK to interface"

This reverts commit d55387f727fd432776bbe46ef2fb933f5bb956f8.
Merge pull request #645 from Ventrella/particles

version 1 of particle system
Merge pull request #660 from PhilipRosedale/master

Add speed brakes for better flying/walking
Merge pull request #662 from birarda/master

revert linking of STK to interface
tweaks to low res moving, made monochrome off by default
Merge pull request #663 from ZappoMan/occlusion_culling

tweaks to low res moving, made monochrome off by default
more work on particle system
Merge remote-tracking branch 'upstream/master' into particles