HDF5_serializers: Added check in create_numpy_structured_array_in_HDF5 to ensure the given data is either of type numpy.ndarray or convertible to it.
test_HDF5_serializers: Added test_HDF5_serializers for testing the HDF5_serializers module. This will address issues #81 and #82.
test_HDF5_serializers: Added tests for create_numpy_structured_array_in_HDF5 from HDF5_serializers. This fixes #81.
test_HDF5_serializers: Added tests for read_numpy_structured_array_from_HDF5 from HDF5_serializers. This fixes #82.