Lots of changes the major change is GdkPaintable is not implemented by window

This code also requires a major redo of the cairo implementation now in
cairo cvs.

gdk/directfb/gdkmain-directfb.c

@@ -105,7 +105,7 @@ _gdk_windowing_exit (void)
 gchar *
 gdk_get_display (void)
 {
-  return "DirectFB";
+  return g_strdup (gdk_display_get_name (gdk_display_get_default ()));
 }