R1:72000404799a

Add a basic chatlog

Summary:
This is pretty simple and unpolished, but it's getting pretty big and it seems
like a reasonable starting point.

- Log chat in various "channels".
- Conduit record and query methods.
- IRCBot integration for IRC logging

Major TODO:

- Web UI is really unpolished and has no search, paging, anchor-linking, etc.
Basically all presentation stuff, though.
- I think the bot should have a map of channels to log with channel aliases?
- The "channels" should probably be…