4.0.0 alpha 1

This is a pre-release for version 4.0.0, which completely redoes the Biome system to move from biome grids to the Biome Pipeline system.

To use this version you will need to use the attached default config (a ZIPped version of the biome branch of the default config repo) with dump-default disabled in the master config.yml file.

Documentation on the pipeline will be coming shortly. The pipeline in the included config is commented.