* Added more database functions.
Added ability to check if a uniqueId exists without creating it - used
to check if a player is known or not.
Added join/quit listener.
* Hooked in grid database to track where islands are.
Added Nether events and portal function.
Added default /island command operation.
* Added protection for islands.
* Updated license to BSD license.
* Removed unused imports.
Added configs.
* Added more protection listeners.
Flying mobs, visitor protection