- Changed user-commands.lisp to irc-mc-bridge.lisp to allow for
  commands as well.
- Added back in the user command handling of yore.
- Removed traces of the user-commands from mc-irc-bridge.lisp
Revert "- Removed all command files that are unnecessary."

This reverts commit d9702324681c120658fc92902fb3acbd6af900f3.