140 add nbs to readthedocs

[jrob93]

Fixes #140 .

I think I've figured out how to add example notebooks to the read the docs.

• Copy notebook into docs/notebooks (N.B. the notebook must have at least one section header)
• Update the toctree in the file docs/notebooks.rst
• To update the docs locally, from the docs dir run: python -m sphinx -T -E -b html -d _build/doctrees -D language=en . ../_readthedocs/html

I want to push this into main to see if the online read the docs is updated automatically.

Review Checklist for Source Code Changes

• Does pip install still work?
• Have you written a unit test for any new functions?
• Do all the units tests run successfully?
• Does adler run successfully on a test set of input files/databases?
• Have you used black on the files you have updated to confirm python programming style guide enforcement?

[jrob93]

Had to update some requirements (scipy). Also, make sure that the notebook being added to the docs is using the python3 (ipykernel) kernel, not some conda env kernel that may only be installed locally