Revocations format & parser (#core-007)

[jvanulde]

Design & parse revocations.json; soft checks.

[edip-dev-01]

Addressed in fork commit edip-dev-01/q-cap@0290c6f: adds signed revocations.json format, parsing, signature verification, and open-time revocation checks via --revocations. Pending upstream merge: edip-dev-01@0290c6f

[edip-dev-01]

Closed by merged PR #39: #39