After internal discussion, it was decided that we need to include
"contributors" to the license header. This avoids claiming that the
Java source files are under the exclusive copyright ownership of Forge
LLC, which excludes contributors that still hold copyright ownership
over their contributions (but is licensed under the LGPLv2.1 as stated
in the Forge CLA).
Tag-enabled registries must now be registered to vanilla's root registry. See RegistryBuilder#hasTags.
Modded tag-enabled registries have to use the format `data/<namespace>/tags/<registrynamespace>/<registryname>/<tag>.json`
This format is to prevent conflicts for registries with the same path but different namespaces
EX: Registry name `examplemod:shoe`, tag name `blue_shoes` would be `data/<namespace>/tags/examplemod/shoe/blue_shoes.json`
RegistryEvent.NewRegistry has been moved and renamed to NewRegistryEvent.
RegistryBuilder#create has been made private. See NewRegistryEvent#create
Created new ITagManager system for looking up Forge tags. See IForgeRegistry#tags.
Add lookup methods for Holders from forge registries. See IForgeRegistry#getHolder.
sciwhiz12