Auto-configuration

[pikesley]

Some code already exists for this:

• https://github.com/theodi/philbot/blob/master/features/config.feature
• https://github.com/theodi/philbot/blob/master/lib/philbot/monitors/admin_monitor.rb

But it didn't survive first contact with the Real World. It complained about some encoding thing, I think editing it with Textedit probably borked it. This looks pretty fixable, though.