Write marshallers to match wire format of Parity, Dfinity, etc.

[cag]

We're using the gob encoding package right now (it exposes a go-specific BinaryMarshaller).

We will want a marshaller(s?) for the following:

• Parity Secret Store.
• Dfinity has their own DKG.

[cag]

Here is an official(AFAIK???) discussion thread: https://ethresear.ch/t/standardizing-distributed-key-generation-dkg/2411

[cag]

Also this may take a while due to the fact Parity Secret Store uses TLS which is based on secp256k1, but the Golang standard lib's TLS doesn't support that curve.