Add key handlers for cinemascope factor(page up/page down).
Remove a stale todo that was addressed in the comments of the OVR SDK headers.
Add F9-F11 key handlers for toggling vsync.
Add a key handler to toggle dynamic FBO scaling(Delete key) and set target frame rate to 70(just under DK2's 75).
Add key handlers for two more shader pane options.
Add Kali's excellent "Underwater Life" to shaders/.