#16: data_calculator.py, add comment
#16: data_calculator.py, create 'log/' directory if not exist
Merge pull request #20 from jeff1evesque/python_scanner

#19: Add 'scanner.py'
#17: .gitignore, ignore 'log/' directory
Merge pull request #21 from jeff1evesque/gitignore

#17: Ignore 'log/' directory
#16: data_calculator.py, remove attempt to create 'log/' directory
Merge pull request #23 from jeff1evesque/python_data_calculator

#16: Ensure 'data_calculator.py' creates 'log/' directory
#16: scanner.py, add 'log/' directory if doesn't exist