adding a DiabloDrops-inspired tier.yml
bumping version to begin restructuring and improvement of API
moving MythicLoader and MythicSaver to their own packages
updating subclasses of MythicLoader and MythicSaver to new package
refactoring name of MythicLoader and MythicSaver
adding a bunch of interfaces for future use
populating CustomItemManager interface
populating DropManager interface
populating EntityManager interface
adding getPlugin() method to DropManager interface
populating ItemManager interface
populating LanguageManager interface
populating NameManager interface
populating SettingsManager interface
populating TierManager interface
refactoring manager classes to begin with Mythic
adding MythicCommand interface
populating MythicDrops interface
refactoring MythicDrops class to MythicDropsPlugin
adding debug method to MythicDrops interface