Perhaps create separate student-facing repository (to hide solutions for students)

[dybber]

Perhaps we can have a repository just containing:

• an empty notebook file called housing.ipynb
• the housing_util.py file
• the dataset
• a README.md with links to the

Make that other repository a submodule of this one, so we don't need to update the housing_util.py and dataset in both places, but only in the public and student-facing one

[dybber]

Let's wait doing this until we're ready with the material, as it introduces some complexity during development