Allow to set custom function for getting groups of a contact. Make

Allow to set custom function for getting groups of a contact. Make

2007-05-20  Xavier Claessens  <xclaesse@gmail.com>

	* libempathy-gtk/gossip-contact-list-store.c: Allow to set custom
	function for getting groups of a contact. Make possible to have groups
	for presence or role/affiliation in chatroom for example.
	* libempathy-gtk/gossip-contact-list-store.h: Allow to set custom
	function to handle DnD of contact. Useful when a custom function is set
	for groups.
	* src/empathy-chat-main.c: Minor fix.
	* TODO:
	* po/POTFILES.in: Updated.

svn path=/trunk/; revision=76