[Intel-gfx] [i-g-t] Stereo 3D

[Damien Lespiau]

This series makes testdisplay able to display top and bottom, side by side half
and frame packing stereo framebuffers. The final fb is composited from separate
left and right images using cairo.

I skipped the first couple of patches because of 2 massive 1080p pngs, but
pushed a branch:
  http://cgit.freedesktop.org/~damien/intel-gpu-tools/log/?h=20130906-stereo-3d

-- 
Damien