Refactor command line code for update only feature
Refactor command line code for update only feature

Refactored command line code using argparse module in prepration to add
feature to load_data module where only specific data files are updated
based on passed unique_data_ids.

TODO: Complete new 'update_only' feature that will require atleast one
valid unique_data_id

pfjel7/housing-insights,pfjel7/housing-insights,codefordc/housing-insights