Contact Controller Refactorization

For now, there's just the thread about it on the devl mailing list (and a few tons in my chatlog, which I can't reference here):

http://adiumx.com/pipermail/adium-devl_adiumx.com/2006-September/000866.html

The plan is to make creating the API for this module a community work, since it's very important for everything else in Adium.

More to follow...