2005-04-22  Mark McLoughlin  <mark@skynet.ie>

        Use FAM directly instead of gnome-vfs and ensure that
        we only ever add a single FAM monitor any given path.
        Should fix bug #160194.

        Oh, also use the FAMNoExists() extension from gamin
        if available - should cut down on a whole heap of
        FAM traffic.

        * configure.in: don't require gnome-vfs, check for FAM
        and FAMNoExists().

        * libmenu/Makefile.am: build menu-monitor.[ch] and
        link against libfam.

        * libmenu/menu-monitor.[ch]: add file/directory monitoring
        implementation using FAM.

        * libmenu/entry-directories.c,
          libmenu/gmenu-tree.c: use the internal monitoring API
        instead of gnome-vfs.

        * python/gmenu.c,
          util/test-menu-spec.c: (main): no need to initialize
        gnome-vfs anymore.

        * python/Makefile.am,
          util/Makefile.am: upd.