added public methods Say, Action, Join, Part, Quit, Nick, Whois, and Mode to the bot object. I think this is a better location, leaving only SendRaw as the public interface of the IrcClient object.
Added logging to file support (mandatory at the moment) to config.go and the Debug/Log methods
got the irc clients logging messages
added log_dir
updated exposed lua methods to take advantage of the new methods exposed in bot.go