> 0.6 :
- Updated icon pack.
- Fixed some structures that didn't spawn due to coding errors.
- Improved the spawn percentage of some structures.
- Add a Rock in desert and mesa.
- Stone now has a model.
- New structure	    :
  Custom oak tree, Custom birch tree, Custom spruce tree.
- Updated structure :
  Wither castle.
- Deleted structure : 
  Bush, Hidden chest, Lost villager, Illager patrol.
- New Feature       : 
  Grass on the surface spawn more.
  Stone loads on the surface like ore.