Execution example::

  table_create --name Magazine --flags TABLE_HASH_KEY --key_type ShortText
  # [[0, 1337566253.89858, 0.000355720520019531], true]
  column_create --table Magazine --name title --type ShortText
  # [[0, 1337566253.89858, 0.000355720520019531], true]
  load --table Magazine
  [
  {"_key":"http://test.jp/magazine/webplus","title":"WEB+"},
  {"_key":"http://test.jp/magazine/database","title":"DataBase"},
  ]
  # [[0, 1337566253.89858, 0.000355720520019531], 2]
