Bukkit

Fixed:
* Spawner no longer being recognised if Tier was null
* Fix mobs only spawning if you're outside of the 16 block radius rather than inside.
* Fix amplified x, y and z per mob spawn.

Changes:
* Added in an auto-updater, any migrations will be handled automatically. To disable this add `auto-update: false` to the config.
* Improved performance a bit
* Added /soulshards debug-mode which prints a lot of info whenever there's a spawn event. This is very helpful if you ever face an issue, please send me the output of this from start to finish if reporting an issue!