Protobuf in blockchain data

[henriqueaklein]

The current blockchain implementation serializes and deserializes into crdt by calling scale::encode method on SuperGenius and writing as a base::Buffer. That could make it difficult for the dashboard to get this data.

Consider changing how things are serialized by inserting protobuf structures instead.

[henriqueaklein]

Got the block header, hash and data to be serialized/deserialized in protobuf structures, however hash wasn't used on the dashboard, since it's mostly used for internal purposes.