* tuple hashing functions across languages
  There are three parallel implementations of a hash for every entry of a tuple
  list.  The functions produce identical results across 3 languages and can be
  used across agent / server / client.

  #+BEGIN_SRC sh 
    hohn@ghm3 ~/work-gh/mrva/mrvacommander/experimental/qldb-specification
    0:$ node tuple-hash.js
    [
      '91b80a9933218ff5bc62df8ff71f1252',
      'b0934b29293e91aefaac73c99fc75e94'
    ]

    hohn@ghm3 ~/work-gh/mrva/mrvacommander/experimental/qldb-specification
    0:$ python3 tuple-hash.py
    ['91b80a9933218ff5bc62df8ff71f1252', 'b0934b29293e91aefaac73c99fc75e94']

    hohn@ghm3 ~/work-gh/mrva/mrvacommander/experimental/qldb-specification
    0:$ go run tuple-hash.go
    [91b80a9933218ff5bc62df8ff71f1252 b0934b29293e91aefaac73c99fc75e94]
  #+END_SRC