Spawner issue fixed

Use Hashmap to store mobs info on spawn event if the spawn reason was from a spawner then adds there UUID to the Hashmap. Then onDeath it checks if that mobs UUID is on the Hashmap. It works if you relog or move the mobs out of the chunk and relog etc. Only flaw is reloads/restarts which won't be an issue as I don't do reloads.