2002-02-09  Havoc Pennington  <hp@pobox.com>

	* src/window.c (update_icon): port to icon cache

	* src/iconcache.c, src/iconcache.c: begin process of cleaning up
	window.c by moving the icon-reading code in here, based on the
	code in libwnck, which was in turn based on the earlier metacity
	code