assets
Meh-ish helicopter physics
Collision callbacks
tank steering
Merge branch 'master' into havok

Conflicts:
	assets
	src/GameWorld.cpp
	vs11/Returngeance/Returngeance.vcxproj.filters
tank stuff
Merge remote-tracking branch 'origin/vehicle-helicopter' into havok

Conflicts:
	src/GameWorld.cpp
	vs11/Returngeance/Returngeance.vcxproj
Recoil while firing, clamp inputs, merge Helicopter
Assets
Brakes working
Convert functions working in debug
fix
Merge branch 'havok' into gui

Conflicts:
	vs11/Returngeance/Returngeance.vcxproj.filters
MULTIPLAYER