Parses the options and arguments from the command line.

def _parser_options():
    """Parses the options and arguments from the command line."""
    #We have two options: get some of the details from the config file,
    import argparse
    from acorn import base
    pdescr = "ACORN setup and custom configuration"
    parser = argparse.ArgumentParser(parents=[base.bparser], description=pdescr)
    for arg, options in script_options.items():
        parser.add_argument(arg, **options)
        
    args = base.exhandler(examples, parser)
    if args is None:
        return

    return args