gtk_main() in its own thread, and does nothing on subsequent calls. This
ensures that gtk_main is only running once.
* ./modules/gui/familiar/*, modules/gui/gtk/*: the familiar, gtk and gnome
modules are now fully reentrant thanks to their use of the gtk_main module.
* ./src/libvlc.c: implemented vlc_set(), a wrapper for config_Put* available
to external programs.
* ./src/libvlc.c: removed vlc_stop() and vlc_end(), everything is now done
* ./modules/control/rc/rc.c: implemented a few new functions. For instance,
run "vlc -I rc" and then type "intf gtk" or "intf gnome". You can even
launch several of them. "segfault" works, too.