* libnautilus-extensions/nautilus-scalable-font.c:
	(nautilus_scalable_font_measure_text), (invert_glyph),
	(nautilus_scalable_font_draw_text),
	(nautilus_scalable_font_draw_text_lines_with_dimensions),
	(nautilus_scalable_font_draw_text_lines),
	(nautilus_text_layout_paint):
	* libnautilus-extensions/nautilus-scalable-font.h:
	Add support for drawint inverted text.  Also cleanup the rendering
	function a bit.

	* libnautilus-extensions/nautilus-icon-factory.c: (embed_text):
	* libnautilus-extensions/nautilus-label.c: (render_buffer_pixbuf):
	* src/nautilus-about.c: (draw_aa_string):
	* src/nautilus-sidebar-tabs.c: (draw_one_tab_plain),
	(draw_one_tab_themed):
	Update all these for the new inverted scalable font api.

	* test/test-nautilus-font.c: (main):
	Add a inverted text test.