IRC channel for Rails Tutorial

Thanks to the efforts of Miles Forrest, the Ruby on Rails Tutorial project now has a dedicated IRC channel! Find it at #railstutorial on irc.freenode.net using your favorite IRC client or at http://webchat.freenode.net in your browser. (See this guide if you need help getting started with IRC.) Miles has generously volunteered to oversee the chat room, and I certainly plan to drop by from time to time. I hope people find it useful.