Special case for VP8 alternate reference frames

With VP8, NODIS is only returned if such frames are encountered. Then,
the frame should be marked as DECODE_ONLY, and finished.

Signed-off-by: Carlos Rafael Giani <dv@pseudoterminal.org>
Add properties to eglvivsink for setting window size and coordinates

In addition, it is now possible to make the window borderless, also causing
the window manager to ignore it

Signed-off-by: Carlos Rafael Giani <dv@pseudoterminal.org>
Cleanup

Signed-off-by: Carlos Rafael Giani <dv@pseudoterminal.org>