Develop spatial workshop submodule two

[sjspielman]

This epic tracks work to develop the second spatial workshop submodule on spatial clustering and domain detection.

Goals for this epic include:

• Outline submodule 2 instruction notebook, including the dataset to use
• Complete submodule 2 instruction notebook
• Outline submodule 2 exercise notebook, including the dataset to use
• Complete submodule 2 exercise notebook
• Maintain spatial module cheatsheet