Test vectors representation

[BasileiosKal]

Display test vectors based on CDDL, to be consistent with the BBS Signatures core draft.

[Wind4Greg]

What is CDDL? I'm assuming its not "Common Development and Distribution License (CDDL)". My action item or yours? Cheers.

[BasileiosKal]

CDDL is Concise Data Definition Language, used to represent CBOR data structures.

I can take up the action item. Thank you!