Add markup column support.

Add markup column support.

2004-07-02  Anders Carlsson  <andersca@gnome.org>

	* libegg/iconlist/eggiconlist.c: (egg_icon_list_class_init),
	(egg_icon_list_init), (egg_icon_list_set_property),
	(egg_icon_list_get_property), (egg_icon_list_calculate_item_size),
	(egg_icon_list_paint_item), (egg_icon_list_update_item_text),
	(egg_icon_list_get_text_column), (egg_icon_list_set_markup_column),
	(egg_icon_list_get_markup_column),
	(egg_icon_list_set_pixbuf_column),
	(egg_icon_list_get_pixbuf_column):
	* libegg/iconlist/eggiconlist.h:
	* libegg/iconlist/testiconlist.c: (fill_model), (create_model):
	Add markup column support.