Register, too

Two-step registration process - add an "ownermail" config item in the
IRC object, then find the verify key in the email Freenode sends you
and add that as "regverify" in the IRC config. You can then safely take
both of those keys out of the config file.
Censor IRC registration stuff in brain.py
Merge pull request #10 from MarkTraceur/register-too

Register, too