Easier World Creator

2.1.0 changelog :

• support for multi-chunk features is now here! You can now create features that are larger than a chunk simply by dividing a Set<BlockPos> into chunks (that gives you a List<Set<BlockPos>>
• some performance improvements are here notabilly on the torus gen(between 5x to 20x faster)
• added a lot of javadoc
• new util classes and methods related
• fix done to radial and cylindrical layerType
• the old worlds are compatible with multi-chunks features
• you can now generate nbt files, load nbt files into a world, modify a nbt file before placing it