Add richer job response from bot

Currently bot can name the most popular among a group of people, but there's much more you could say:

Here's the most central characters in that group (just run the get_friends algorithm iteratively until it converges on the same group of friends). This might be too taking on the bot and not interesting enough.
Use carrot2 clustering (see the Clustering notebook) to pull out common text from the users' descriptions and locations - this can be used to determine where the users are and what they're interested in.
Tell which of the requestors followers could be good introductions to this crowd.

JnBrymn / minglbot