* libnautilus-extensions/nautilus-buffered-widget.c:
	(nautilus_buffered_widget_initialize_class),
	(nautilus_buffered_widget_realize),
	(nautilus_buffered_widget_draw),
	(nautilus_buffered_widget_size_allocate),
	(nautilus_buffered_widget_expose_event):
	Some dumb renamings and superfluous assertion removal.

	* libnautilus-extensions/nautilus-image.c:
	(nautilus_image_initialize_class), (nautilus_image_draw),
	(nautilus_image_expose_event), (nautilus_image_paint),
	(nautilus_image_set_alpha_mode):
	Add support for two alpha rendering modes: 1) FULL, the pixbuf is
	composited on top of the widget's background - expensive.  2)
	THRESHOLD, the pixbuf is drawn with an alpha threshold without any
	compositing - fast but not as smooth.

	* libnautilus-extensions/nautilus-label.c: (render_buffer_pixbuf):
	Remove a dumb printf i left in before.

	* src/nautilus-sidebar-title.c:
	(nautilus_sidebar_title_initialize), (update_icon),
	(nautilus_sidebar_title_hit_test_icon),
	(sidebar_create_smooth_components_if_needed),
	(sidebar_create_normal_components_if_needed),
	(smooth_graphics_mode_changed_callback):
	Use the new dual alpha support in the image class to simplify
	things.  Create only one icon and change the alpha mode on that
	when the smooth graphics preference changes.  Ill do the same for
	emblems later.