Changes & features

- Moved from a moderated/devoice approach to using ChanServ's QUIET
  (+q). This might only work on freenode, dunno which irc networks
  support this.
- Bot can identify with NickServ now (use --ns_password to set NickServ
  password on start).
- Bot now joins a list of channels on start automatically (use --channel
  for a single channel or --channel_list with a path to a file
  containing a list of channels seperated by newlines).
- Adds a !nick command to change the bot's nick while connected.
Automatically +q users that are blacklisted