itervalues and Python 3.x

[ghukill]

Looks as though issue #9 may have popped up again in cyavro version 0.7.0?

/opt/miniconda/envs/combine/lib/python3.5/site-packages/cyavro/__init__.py in <genexpr>(.0)
    499         elif issubclass(tp, dict):
    500             # get value element type
--> 501             values = (x.itervalues() for x in iterable)
    502             value_type = _get_python_type(
    503                 list(itertools.chain.from_iterable(values)))

AttributeError: 'dict' object has no attribute 'itervalues'