Merge pull request #231 from maxim-belkin/fix-util

    try:

        with open(filename, 'r') as reader:

            return yaml.load(reader)

    except (yaml.YAMLError, FileNotFoundError) as e:

    except (yaml.YAMLError, IOError) as e:

        print('Unable to load YAML file {0}:\n{1}'.format(filename, e), file=sys.stderr)

        sys.exit(1)