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 :help (testDayAdmins only: ashughes, whimboo, galgeek for now) for test day admin help.
stats for now print to the console.
Stats should be available at any time. If no testday is active, it should generate and show the stats of the last testday.