Griswold 0.076 build

This build is compatible with 1.12 now. Tested on spigot, should work on anything bukkit-based as well.
New features:
-- Tab completion
-- Got back hide/unhide commands. You can temporarily hide NPCs to manage space/etc.
Fixes:
-- Enchantments are done via bukkit api now, this should improve stability
-- Rewritten (hence, fixed) villager deduplication methods. Consider increasing your check-radius in config if it doesn't work properly.
-- Fixed villager sounds
-- Other stability improvements. Plugin will not break each version, since new api version parser implemented and less NMS methods are used from now on.