Added archive task

  * Still needs to copy model outputs, but restart and logs
    already working.
  * Wrote some functions to clear output and generate HSM path.
Added prepare_restart in the models.

  * prepare_restart is called by check_restart.
  * Added a simple verify_run to mom4, need to implement more checks.
Small fixes

  * verify_run was running on the wrong file, fixed.
  * prepare_restart was copying the wrong day
  * when cloning exp_repo in env_options it failed
    if another exp repo was used. Always cloning
    for now, need to think better how to do it
    (probably when check_code is rewritten to
    abstract which SCM is used)
  * Removed constant GET_STATUS_SLEEP_TIME and put it
    in environ, but if it is not available defaults to
    60 seconds.