Notebook tour

The notebook set in v1.8 is meant to be read, not just used as skeleton files.

Key walkthroughs:

• 01_start_here.ipynb
• 03_canonical_benchmark.ipynb
• 15_climate_grid_demo.ipynb
• 16_hospital_surge_demo.ipynb
• 17_repo_breakout_demo.ipynb
• 18_detector_downtime_demo.ipynb
• 19_minimum_wage_employment_demo.ipynb
• 20_viral_attention_demo.ipynb
• 21_colab_quickstart.ipynb