Try to load the Django settings.
        If this does not work, than settings file does not exist.

        Returns:
            Loaded configuration, or None.

def check_web_config(config_fname):
    '''
        Try to load the Django settings.
        If this does not work, than settings file does not exist.

        Returns:
            Loaded configuration, or None.
    '''
    print("Looking for config file at {0} ...".format(config_fname))
    config = RawConfigParser()
    try:
        config.readfp(open(config_fname))
        return config
    except IOError:
        print("ERROR: Seems like the config file does not exist. Please call 'opensubmit-web configcreate' first, or specify a location with the '-c' option.")
        return None