fixed bug 4369, throbber frozen during long refresh, by making the
	throbber a bonobo component so it's driven by its own thread.
	Note that clicking on the throbber is temporarily broken; I'll
	fix that soon.  Also, made the frame delay be specified by the
	theme and set the default to spin somewhat slower than before.

	* configure.in:
	* components/Makefile.am:
	* components/throbber/.cvsignore:
	* components/throbber/Makefile.am:
	* components/throbber/nautilus-throbber.oafinfo:
	added throbber component

	* components/throbber/main.c: (throbber_object_destroyed),
	(throbber_make_object), (main):
	factory for the throbber component

	* components/throbber/nautilus-throbber.c,h:
	(nautilus_throbber_initialize_class), (is_throbbing),
	(get_bonobo_properties), (set_bonobo_properties),
	(nautilus_throbber_destroy), (nautilus_throbber_get_control),
	(get_throbber_dimensions), (nautilus_throbber_initialize),
	(nautilus_throbber_new), (nautilus_throbber_theme_changed),
	(draw_pixbuf), (select_throbber_image), (draw_throbber_image),
	(nautilus_throbber_draw), (nautilus_throbber_expose),
	(nautilus_throbber_map), (bump_throbber_frame),
	(nautilus_throbber_start),
	(nautilus_throbber_remove_update_callback),
	(nautilus_throbber_stop), (nautilus_throbber_unload_images),
	(load_themed_image), (make_throbber_frame_name),
	(nautilus_throbber_load_images),
	(nautilus_throbber_button_press_event),
	(nautilus_throbber_set_small_mode),
	(nautilus_throbber_size_allocate),
	(nautilus_throbber_size_request):
	throbber widget for the bonobo component

	* src/nautilus-window-toolbars.c: (theme_changed_callback),
	(nautilus_window_initialize_toolbars):
	set up throbber component in the toolbar

	* src/nautilus-window.c,h: (nautilus_window_constructed),
	(nautilus_window_allow_stop):
	use property interface to start and stop the throbber

	* icons/default.xml:
	added delay specification to throbber in default theme

	* nautilus-clean.sh:
	clean throbber component as necessary

	* src/Makefile.am:
	* src/nautilus-throbber.c,h
	removed old throbber widget