glib-sharp will only get a new release with the new API that we need for
3.0 in a year or something. Instead of waiting a year before we can release
something we now have our own internal copy of glib-sharp trunk that will
be dropped once glib-sharp 3.0 is released.
Everything is now compilable and working without any additional patches.
Unfortunately this requires us to work around Gtk# being unable
to handle static interface methods and Gtk# being unable to
allow us to override interface adapter code...
