Added
- Data migration from/to `Essentials`
- `/serversystem` command to migrate data, reload and version-check
- `/suicide` command
- `/kick` command
- Command replacer system
- Auto-Updater / VersionChecker
- Default language config option instead of forcing client-language as default

Improved
- `/skull` command with `MineSkin` API to properly use Skin-URLs
- `ConfigReader` readability/maintainability
- Message handling: ServerSystem now supports String-Lists for multi-line messages (Dev note: Strings and String-Lists are interchangeable)

Fixed
- Bugs with `ConfigReader`


See compare for a full in-depth changelog