fixes a bug where two digit naics codes were rejected by regular expression
starts building a new checkValidity script.
removes a TODO comment from the top.
Removed unused import
Implement data directory path
Ignore PyCharm IDE files
adds todo items for check validity script.
checkValidity1_3.py adds ability to specify multiple data paths from command line
checkValidity1_3.py adds a question to the comments.
adds code to start examining files
merges upstream changes with mine