add a favorite and tp-channel property to EmpathyChatroom
add a favorite and tp-channel property to EmpathyChatroom

svn path=/trunk/; revision=1533

Distrotech/telepathy-account-widgets,GNOME/telepathy-account-widgets,GNOME/telepathy-account-widgets,GNOME/telepathy-account-widgets,Distrotech/telepathy-account-widgets