GOALS:
simplicity
as little boilerplate and magic as possible
multithreaded dispatch

plugins are located in plugins/

input:
nick -- string, the nickname of whoever sent the message
channel -- string, the channel the message was sent on. Equal to nick if it's a private message.
msg -- string, the line that was sent
raw -- string, the raw full line that was sent
re -- the result of doing re.match(hook, msg)

attributes and methods of bot:
say(msg): obvious
reply(msg): say(input.nick + ": " + msg)
msg(target, msg): sends msg to target
(other irc commands, like mode, topic, etc)