2001-11-19  Mark McLoughlin  <mark@skynet.ie>

        * panel-applet-frame.[ch]:
        (panel_applet_frame_change_background),
        (panel_applet_frame_change_background_pixmap),
        (panel_applet_frame_change_background_colour),
        (panel_applet_frame_clear_background): impl.

        * panel-applet-shell.c:
        (impl_GNOME_PanelAppletShell_changeBackground): impl.
        (panel_applet_shell_class_init): upd.

        * panel-applet.[ch], panel-applet-private.h:
        (panel_applet_set_background_colour),
        (panel_applet_set_background_pixmap),
        (panel_applet_clear_background): impl.
        (panel_applet_class_init): register "change_background"
        signal.

        * panel-marshal.list: add VOID:ENUM,POINTER,STRING.

        * panel.c: (back_change): update for bonobo applets.

        * test-bonobo-applet.c:
        (test_applet_handle_background_change): impl - just print out
        a message for now.