Drop misleading "or re-enrol" after permanent revoke; enrol refuses an existing agent before spending the seed. checkpoint() refuses a currently revoked/suspended signer. README (and DESIGN) test count updated to 156.
Drop misleading "or re-enrol" after permanent revoke; enrol refuses an existing agent before spending the seed. checkpoint() refuses a currently revoked/suspended signer. README (and DESIGN) test count updated to 156.