GitLab

As we do in most other repos.

README: update badges for repo rename

Update go-cid (and go-block-format)

Implement a block decoding system

To register a new block decoder:

1. Define a function conforming to the `DecodeBlockFunc` type signature.

2. Add it to the `DefaultBlockDecoder` map from a your package's `init`
   function.

This way it's clear that all nodes are valid blocks.

gx update-tree go-cid go-libp2p-interface-pnet