Logging

[atbrandt]

Discord's built-in server log functions leave a bit to be desired. When a message is deleted, there's no way to check what was actually in the message originally. There's no way to track who has joined what voice channel. There's no way to track who has changed their display name to what and when. The bot should allow users to define what, if any, logging they would like to have, along with setting a specific channel where logging should be displayed.