Alpha 27.2

Patches a few things

• archer accuracy
• performance of perlin3d
• fixed generation of some things
• now support for metadata in config blocks! (e.g. you can now use "minecraft:wool:14" for the cover block, format: "namspace":"block":"meta, if the block has that")
• added option to toggle health scaling
• Implemented a proper way to avoid clipping in vanilla structures