updating redesign version to 3.0.0-SNAPSHOT
removing all classes except for API classes
removing unnecessary dependencies for redesign
removing more classes for redesign
adding MythicItemStack
adding NonrepairableItemStack class
updating some javadoc for NonrepairableItemStack
adding MythicEnchantment class
adding CuboidRegion class
adding equals and hashCode methods
removing CuboidRegion
adding ItemGenerationReason
adding more constructors to MythicItemStack
adding MythicTome class
adding javadoc to MythicDropsEvent
adding javadoc to MythicDropsCancellableEvent
moving away from deprecated Bukkit API
adding CustomItem interface
adding CustomItemManager interface
tweaking CustomItemManager