Remove ffmpegcolorspace and videoscale
videoscale isn't supporting NV12, so it causes an unnecessary conversion
to NV12 or YV12. Technically, I think we can leave ffmpegcolorspace,
but the better solution is to fix videoscale to support NV12.
WIP: add eglimage rendering
A few things need cleaning up still.. mainly somehow auto-detecting if
eglImage and a suitable extension for creating eglImage's exists.
initial commit - from ubuntu 11.10 src package