Specifically, the mode handling and the end of list modes are delayed until the end of the WHO reply from the server. When the end of the WHO reply is received, all queued operations on the channel, if any, are triggered at once in the form of relevant events.
This also does some more bits of rudimentary user handling, but most of it still remains to be done.
Note: This adds DEV_PREFIX to botconfig and LOG_PREFIX to settings (var), make sure to properly update your bot!
If the channel is being deleted, we don't need to care about the state. Furthermore, if the channel is being deleted as Python is shutting down, _States will have been deleted (or set to None), so we can't access it. Rather than trying to work around the garbage collection, we just set it to None and call it a day.
