ELCO: Large changes to the ert_tcp_client:

  - The client has been renamed ert_tcp_test_client
  - The ability to run commands interactively has been removed, it can
    now only play through a json file.
  - A default hostname and port has been specified, but they can be
    changed with commandline argument --host=hostname:port
ELCO: Added logging and argument parsing to ert_server
ELCO: Added module ert_client