Add logging to the application

[dtoakley]

As a developer I want appropriate web logging added to the python application so that I can monitor the application health better.

Acceptance criteria:

• Simple logging is added to a few classes to replace any print statements. Doesn't need to be all classes, just important ones.

• Logging is configured to write logs to the server - possibly /var/log, or whatever the correct Flask / python / gunicorn convention is.