Client|Stereo 3D: Cleanup
libappfw|Oculus Rift: Modelview matrix according to head tracking

Added a utility for putting together a modelview matrix for the tracked
head position/orientation, however this is not used by the Doomsday
client at the moment.
UI|Client: Cleanup in 3D & VR Settings

Moved the Oculus Rift specific multisampling setting below the Oculus
Rift subtitle.