Add framework for admin commands (reserved to channel ops),
and introduce the wipe command (cleans up the database).
Move from at/until to now/next API for the bot, which is
simpler to explain. Adapt rendering so that it supports
multiple "next" entries.
Needs to be served by a web server to work.
"cd html && python -m SimpleHTTPServer" should do the trick.
Add JSON backend and basic command to update it.