GUPnP-AV experimental commit

[Jens Georg <mail jensge org>]

Hi,

I pushed a branch to GNOME git that removes the direct dependency of
GUPnP-AV to GUPnP.

The used bits were rather random and without the dependency, it's now
possible to use GUPnP-AV, no matter which GUPnP (stable or unstable) is
used.

It would be awsome if you could test this branch for any regressions
that it might cause.

https://git.gnome.org/browse/gupnp-av/log/?h=wip/no-gupnp

Thanks.