#786: data_validator.py, remove current 'dataset_validation' logic
#786: data_validator.py, correctly iterated list of dict values
#786: data_validator.py, 'validate' each iterated 'value'
#786: data_validator.py, adjust docblock
#786: data_validator.py, minor code indentation
#786: data_validator.py, 'import jsonschema_dataset'
Merge pull request #794 from jeff1evesque/python_data_validator

#786: Adjust 'dataset_validation' validation