* libnautilus/nautilus-icon-factory.c:
	Redid the icon factory to fix a few things:

	- Replaced the existing non-working count-based LRU algorithm with
	  one that works (uses a linked list).
	- Keep resized icons in the cache.
	- Hand out a single NautilusScalableIcon when multiple callers ask
	  for the same icon instead of a new one each time.
	- Fixed one bug where pixbuf's would get an extra ref and never get
	  freed once they are no longer used.

	* libnautilus/nautilus-metadata.h:
	* src/nautilus-index-title.c (nautilus_index_title_set_up_info):
	* libnautilus/nautilus-icon-factory.c
	(nautilus_icon_factory_get_icon_for_file):
	Added keys for the two pieces of metadata Andy just added.

	* libnautilus/gnome-icon-container-private.h:
	* libnautilus/gnome-icon-container.c: (scroll),
	(make_icon_visible), (set_scroll_region): Fixed the code that
	resizes the canvas as items are added and removed to properly
	handle the case where the canvas extends into negative-coordinate
	territory. This included removing the width and height that were
	stored in the private structure.

	* libnautilus/nautilus-directory.c: (nautilus_directory_get): Tiny
	formatting tweak.