Add serverless IM Retroshare

Submitted by Mike

Assigned to Telepathy bugs list

Link to original bug (#12792)

Description

http://Retroshare.sf.net is a serverless encrypted messenger. Please support it in Telepathy. Forum: http://sourceforge.net/forum/forum.php?forum_id=618174 Source: http://retroshare.svn.sourceforge.net/viewvc/retroshare/

thanks