2004-06-20  Murray Cumming  <murrayc@murrayc.com>

        * glom/application.[h|cc]: Added on override of on_menu_help_init() to
        merge in a menu item for the user guide. Called gnome_help_display() in
        the menu signal handler to show the docs.
        * glom/main.cc: Call gnome_program_init() so that gnome_help_display()
        has the information that it needs. Hopefully this coexists with our
        Gtk::Main initialisation.
        * configure.in: Depend on libgnome, because that is where
        gnome_help_display is. That is not good but at least it is not
        libgnomeui.
        * Makefile.am: Add some defines needed by gnome_program_init() - see
        comments in Makefile.am.