Region searching (#461)

* Plot correction, clarifying text

disable gridlines for the sky plotting

* Create Region Searching Workbook.ipynb

This contains the essence of Region Search for now.

* Creating a structure for scratch notebooks

Brainstorming, demos, and testing to share.

* Update RegionSearchTesting.ipynb

black --target-version py38 --line-length 110 is what works, but only if black was installed with [jupyter]

* Update Region Searching Workbook.ipynb

Consolidation into a single Pandas dataframe, Notebook cleanup, master function in preparation for a demo, TODO items added/updated, and a Next Steps added to the end.

* Update Region Searching Workbook.ipynb

Fixed broken/missing get_timestamps. Other minor fixes too.

* Update Region Searching Workbook.ipynb

Fixed hanging function with a pass.