Move the password for autoban into the config.

This involved making another trigger field: 'init'

use it like this:

t.init {
  what to do when trigger is initialized
}

Right now it has use because in the main body of the Trigger.new block, t[:ch] is not
initialized. In the init block, it's guaranteed that t[:ch] will be set.
deleted useless file
Merge branch 'multibot-dev' of https://github.com/pickdenis/ps-chatbot into multibot-dev
Add config info to README