it /should/ always be a string anyway, but sometimes things break with
a TypeError that it is an int instead of the expected string and hangs
up the bot.
Tons of changes. Here's the summary of things that matter most:
* There is no more supybot.fix.
* There is no more supybot.webutils; now there is supybot.utils.web.
* It's no longer webutils.WebError, but just utils.web.Error.
* You shouldn't import itertools, ideally, but instead import utils.iter.
* No more using imap/ifilter in commands unless absolutely necessary. It's
premature optimization and annoying.
* utils.str.format isn't quite ready yet, but will be soon. That'll be the
next big thing to fix in our code.
