Cedrus/libvdpau integration matrix

Status of libvdpau-sunxi functions integration
This matrix should give us an overview of which functions are provided by VDPAU, which are required by various programs and which are already implemented in libvdpau-sunxi.

'''Notice: A '+' in the implemented field does tell us, that this feature *is* somehow integrated. It does not tell us, that it is fully completed yet or that it is free of bugs!!'''