Update to 0.8.3

* Add command to just enable or disable the scoreboard (Add #29)
* Removed path validation by preventing classpath reading
* New database structure
* Add UUID support (Add #21)

* Fix scoreboard enables in a disabled world
* Fix permission checking on creating signs
* Fix updater not running async
* Fix IndexOutOfBoundException in long scores

* Changed playerstats table to "player_stats" (with underscore)

* Removed cache (should fix #23)

* Cleanup