updates to bot.js to support running under #qa channel with occasional test day events

I've been testing this on #testdaybotTest running on irc.mozilla.org. 
Enter :help for general help or /msg _TestDayBot :admin (testDayAdmins only: ashughes, whimboo, galgeek for now) for test day admin help.
stats for now print to the console.
The more relevant question is probably whether _TestDayBot will have privileges to change the channel topic.  I see how to code this, assuming privileges, but otherwise I'm not sure how to handle it with the bot.