Fix for Hubot getting kicked from Freenode

I’ve updated the Hubot (I call her raaabot) to the latest version (2.2.1) after some messing around with npmjs.org dependency fun.

But more importantly I’ve fixed the annoying issue with Freenode kicking users who flood any channel with 5 lines. Even if they’ve OP status.

heroku config:add HUBOT_IRC_UNFLOOD="false"

And a friendly submission to the wiki at https://github.com/nandub/hubot-irc.