Preparing for PotatoBot 4.0!

Basic overview:
- Completely remade major aspects of the bot
- Only one listener, containing generics of all events
- Commands now have their own individual classes
- Interface has been simplified slightly in preparation for full
compatibility
- Removed most file editing capabilities while I work on making them
cleaner (files do still exist)
- Much much more!

Note: There's still quite a few bugs, I'll patch them as I go.