[Telepathy] msn support status

[Nicolò Chieffo]

Thank you very much for the fix! (which on pidgin was also about
custom emoticons and file transfers, so it you ported the whole patch
they should be fixed too)
Sorry, but I realized you worked on papyon only after I mailed him!

You were so fast! I'm now eagerly waiting for offline message support
and chat with invisible users in telepathy-butterfly :)