[PATCH] VLC backend - streaming support

[Daniel O'Neill]

This patch adds support for streaming to the VLC backend based on:

MediaSource ( QIODevice * ioDevice );

... in the Phonon api.

This patch employs the 'ifmem' VLC access module, which is not currently
incorporated into VLC as of the time of writing this.  I can't say it
will in the future either, but I have submitted a patch to them.

Still, in the interests of sharing code, I'm posting the patch for
experimentation or perhaps inspiration.

Patch for phonon-vlc (git head):
http://osgrid.foxmoxie.net/share/phonon-vlc-stream.diff

Patch for VLC (git head, configure with --enable-ifmem):
http://osgrid.foxmoxie.net/share/vlc-ifmem-access.diff