Fast sorting the header-view on sent and received date

[Philip Van Hoof <spam pvanhoof be>]

You can now fast sort in sent and received date using the
GtkTreeIterCompareFunc's:

	 tny_msg_header_list_model_received_date_sort_func and
	 tny_msg_header_list_model_sent_date_sort_func

More information here:
http://developer.gnome.org/doc/API/2.0/gtk/GtkTreeSortable.html#gtk-tree-sortable-set-sort-func

-- 
Philip Van Hoof, software developer at x-tend 
home: me at pvanhoof dot be 
gnome: pvanhoof at gnome dot org 
work: vanhoof at x-tend dot be 
http://www.pvanhoof.be - http://www.x-tend.be