Replace my horrible FGLRenderer.viewport_scalex hack with state setting local to Stereo3D.
Actually use st3d_screendist CVAR.
Remove unneeded viewsector argument from RenderOneEye()
Implement oculus texture warping.
Add side-by-side squished mode, so it might work on my Samsung 3D TV.
Oculua rift is now mode 8.