Hubot killfile / spam filter.
A pattern-based community killfile for outgoing Hubot messages. Implements a middleware to intercept messages Hubot is about to post, prevents matched message being output.
Perhaps you'd like to prevent Hubot being trained to swear, or you use [hubot-twitter-mention](https://github.com/vspiewak/hubot-twitter-mention) but you want to filter out some returned Tweets.
Uses robot.brain to persist killfile entries.
Naming
Just Killing Me Softly - Roberta Flack. It felt like a hubot-ish name on a Friday night.
Configuration
All configuration is done using commands.
Commands
hubot killfile (on|off) - Activate/deactivate killfile.
hubot killfile show - Print the list of patterns to exclude.
hubot killfile add <pattern> - Add killfile entry
hubot killfile remove <N> - Delete killfile entry (by index)