Duck Tools

There are still some textures missing, especially for the raw ore blocks and items!

* Fixed problems with block tags again

* Changed the original Limestone to the natural limestone (you can find a screenshot in the gallery ; additionally this will change all already existing Limestone blocks in your worlds as the id names weren't changed)

+ Added Cracked and Mossy variants for the new limestone (the mossy variant can be made more mossy by right-clicking it with vines, this can only be done once ; additionally you can remove it again with shears and flint & steel)

+ Added textures for brown coal and its blocks

* Modified the worldgen for the new limestone

- Removed bastium and elastium ores from worldgen as they were generating in the previous Limestone (if you already have them in your world, they will stay there)