Add real key registration to Mithril Aggregator and Mithril Signer#198

jpraynaud merged 13 commits intomaininput-output-hk/mithril:mainfrom

jpraynaud/176-add-real-key-registrationinput-output-hk/mithril:jpraynaud/176-add-real-key-registrationCopy head branch name to clipboard