As a side effects, window resize is now implemented.

It is needed as long as we cannot directly get an opengl context
from a vout_thread_t.

macosx/framework: fixed MPEG2 exporting, updated iPod video profile (requires contribs with mp4a encoder) and added a method to stop all this

PPM image format is already supported in FFMPEG. It would be possible to
support it in vlc too with the following patch.
The targetted usage of this change is to be able to do:
vlc --fake-file image.ppm fake://
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

and stretch the search to 1 in the playlist

(refs #1672, 5dca2e33)

The only way to test it for now is to use the following syntax:
avio://full_url
like for example avio://http://myhost/myfile.avi
It cannot be instanciated multiple times per process.

(This is untested as my current hardware driver only has GLX 1.2)

X11 extensions are upward compatible only if they have the same major
version number. In other words, we wouldn't support XVideo >= 3.0.

This requires libx11-xcb, since the higher layers of GLX are not
available for pure X11 C Bindings currently.

TBD: resizing and GLX 1.3