Parses the configuration and creates Parameter instances.

def _create_and_add_parameters(params):
    '''
    Parses the configuration and creates Parameter instances.
    '''
    global _current_parameter
    if _is_simple_type(params):
        _current_parameter = SimpleParameter(params)
        _current_option.add_parameter(_current_parameter)
    else:
        # must be a list
        for i in params:
            if _is_simple_type(i):
                _current_parameter = SimpleParameter(i)
            else:
                _current_parameter = TypedParameter()
                _parse_typed_parameter(i)
            _current_option.add_parameter(_current_parameter)