Update Colab notebooks to new models

[ccerv1]

Go through every notebook in the shared drive and update the query logic to the new models and/or take advantage of more abstracted intermediate models.

[ryscheng]

Turn these into case studies

[ccerv1]

Updated a handful of the Colab tutorials. Added a Quickstart notebook and updated copy in the readme for Insights.

https://github.com/opensource-observer/insights/pull/76