JSON reformat and YAML option
- Now can use YAML or JSON. YAML is translated to/from JSON for NBT conversion
- JSON is reformatted
- There is now a top-level document object with version and other info
- The NBT tag list is always an array now
- Placing tool, world path, and key info in the new upstream JSON comment field
The JSON/YAML produced and consumed by this version is not compatible with pre-0.2.0 versions.