Cleverbot integration (for lonely days)

[StewPoll]

What good is a bot if you can't talk to it!?

As discussed in #45 we determined how to figure out if a channel was a DM or a in a group/channel

I propose that we write a plugin that when a person mentions the bot in a group or channel, it defaults to a cleverbot plugin utilising this little library. (Only if no other response is being sent)

If it's in a DM, we default to that plugin if no response is being sent.

With that being said... it does make it a bit more difficult if group DMs have a similar ID to one-on-one DMs.... Group DMs you'd want to handle the same as groups