Twitter authentication

Inspired by 0xabadidea

If I ever lose control of my Twitter account, I will authenticate the new one, or prove my having recovered the old one, by decoding the hash

8a073e9fcc222c7fd80a0212c53600b340e5dabfb378334b81efb151b89e148d

published at https://twitter.com/passcod/status/705952798844715008, which is also now here and in the git history.