Starting a regexp handler. Remove the GitHub and BugZilla handlers.
Add a regexp handler.
tests for the regexp handler
Add default searchers in default_searchers.js. Hook this up to get to the searchers handler.
adding a blocked handler, making handlers act a bit like a middleware. Each handler takes both a print and a next callback
Starting to tease out a way for each handler to respond to any type of message.

Hook this up to blocked first.
Update all the handlers to work with multiple messages.
Simplify event handler interfaces:

* Update all handlers to accept various events and take opts, print, next as input parameters.
* Update blocked handler to save messages if users are not currently online.
Fix the github matcher so that strange URLs are not matched.
Fix the bugzilla and github short regexps.
accept by or on in "blocked by"