#440: data_validator.py, define docblock for 'xml_validation' method
#440: data_validator.py, define 'xml_validation' method stub
#442: data_validator.py, adjust 'file_upload_validation' docblock
#442: data_validator.py, adjust docblocks
#442: data_validator.py, adjust 'file_upload_validation' docblock
#393: data_validator.py, fix 'analysis' logic, use 'json.loads()'
#440: data_validator.py, further define 'xml_validation'
#440: data_validator.py, fix typo
#440: data_validator.py, 'import etree'
#440: data_validator.py, define 'except' statement
#440: data_validator.py, add comments
#440: data_validator.py, print error 'msg' for xml
#440: data_validator.py, implement 'etree.XML()'
#440: data_validator.py, add hashed value(s) of xml files
#440: data_validator.py, replace JSON with unique xml 'file ref(s)'
#440: data_validator.py, print error when no xml file(s) provided
#440: data_validator.py, add minor 'newlines' to source code
Merge pull request #446 from jeff1evesque/python_data_validator

#440: Properly validate within 'data_validator.py'