#316: helper.py, add file with 'shebang'
#316: helper.py, file docblock
#316: helper.py, add 'md5_for_file' method
#316: helper.py, method docblock
#316: helper.py, define 'import hashlib'
#316: helper.py, minor comment change
Merge pull request #317 from jeff1evesque/python_helper

#316: Compute hash value of file content
Merge branch 'master' into python_data_validator
#300: data_validator.py, remove 'import hashlib'
#300: data_validator.py, 'from helper import md5_for_file'