Menu + Oculus SDK v0.4 Position Support!

- bump version to 1.85
- options VR submenu! set options without console commands
- eliminated VR_RenderScene in favor of VR_SetupView to account for
position changes
- preprocessor #defines for Oculus SDK v0.3 + v0.4 switching to support
multiple platforms/SDKs seamlessly and simultaneously
- tweaked intermission
- bumped host_maxfps default to 240
- miscellaneous cleanup