2005-04-11  Mark McLoughlin  <mark@skynet.ie>

        "Namespace" the API
          + menu-tree.h -> gmenu-tree.h
          + menu_tree_* -> gmenu_tree_*
          + MenuTree* -> GMenuTree*
          + MENU_TREE_* -> GMENU_TREE_*
          + MENU_I_KNOW_THIS_IS_UNSTABLE -> GMENU_I_KNOW_THIS_IS_UNSTABLE

        * configure.in: upd for menu-tree.h rename.

        * libmenu/Makefile.am: upd for renamed files.

        * libmenu/gmenu-tree.[ch]: rename from menu-tree.[ch] and rename
        the APIs.

        * python/Makefile.am,
          python/gmenu.c: update.

        * util/Makefile.am,
          util/test-menu-spec.c: update.