Added support for semi-automatic updates

-Added support for semi-automatic updates trough a combination of a bot
command and a simple shell script
-Added a message queue which the bot will attempt to write to the
channel as soon as it connects
-Added functionality for printing the stack trace to the -ed command
-Removed the ugly 'throws Exception' from the main method (about time)
-Added rem persistence by storing rems in the database
-Added the -ur command
-Added variables to the -rem command
-Now also tracks which URLs are linked in the channel, how often they
have been linked, and who last linked each URL
-Added support for logging to a log file