adding RandomItemGenerationEvent
adding EntityDyingEvent
MythicItemStack over ItemStack
adding EntitySpawningEvent
adding creatureSpawning.yml
adding creatureSpawning.yml methods to ConfigSettings
improving a few ConfigSettings methods for future use
implementing all of ConfigSettings' methods
adding methods to set chances and tiers
adding new feature configuration
adding a necessary method for loading
adding TierUtil class
loading almost everything from creatureSpawning.yml
finishing loading creatureSpawning.yml