Python Tools Refactor

[euanwm]

Current folder and package structure requires a refactor.

1. Remove unused code
2. Restructure code structure / layout
3. Add tests

Proposed Structure
The database_handler package has large amounts of code that are unused and can be removed entirely. The main elements required are those that are related to the check_db.py and backend_cli.py scripts.

web_scrapers.py & norway.py
These can be broken down into individual modules / files so that as we add more scrapers, it is easier to manage.