Always Loaded

• Initial upload. Support for 1.15.x

• Rewritten most of the code, because the old one was terrible.
  
• Extended version compatibility to 1.16
  
• Renamed chunks.loaded and chunks.loaded.old to tickets.saved and tickets.saved.old
  
• Those files are now stored in world/dimension/data instead of world/data/ - separate for every dimension.
  
• Their format has also been changed.
  "long_pos minecraft:dimension" -> "x y z"
  
• Files with the old format will still be loaded, but upon saving will be converted to the new one.
  
• Console logging improvements.

- Initial upload.