Ember - donation system, bans, loading screen & landing/index page

1. Implemented user IDs
2. Users no longer depend on a SteamID - account creation is possible using any supported provider
3. Added a Minecraft UUID column for the upcoming integration
4. Implemented user impersonation
5. Restructured server API
6. Moved configuration to web UI - update your server configuration
7. Added a toggle for top & recent donation lists
8. Minor bug fixes and improvements

Taking a database backup before updating is recommended.