Renamed the fielded_numpy_ndarray_as_struct option to structured_numpy_ndarray_as_struct.
Fixed tests to work with how dicts are read back as structured np.ndarrays if python metadata isn't stored.
Updated documentation with regards to reading/writing structured numpy.ndarrays and fixed errors.
Changed the setting of string array attributes to use str instead of np.bytes_ (unicode instead of ASCII).
Renamed the Attribute Python.numpy.Fields to Python.Fields and made it so that if it wasn't given, fields are sorted when making a structured ndarray.
Updated documentation.