Batsim CLI update (docopt + clean).
All options no longer require a short name. -> rare options are only long now. Some options have been renamed to sound clearer. --mmax, --mmax-workload, --enable-sg-process-tracing, --allow-time-sharing, --workflow-jobs-limit, ... Some default values have been changed for consistency. --mmax and --workflow-jobs-limit both have 0 as default unlimited value. Running batsim --help should now be more readable, and display what can be done via the CLI.