Uncomment data download/untar commands; update writing to match

[OliviaLynn]

Problem & Solution Description (including issue #)

#112

Code Quality

• My code follows the code style of this project
• My code contains relevant comments and necessary documentation for future maintainers; the change is reflected in applicable demos/tutorials (with output cleared!) and added/updated docstrings use the NumPy docstring format

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a47c55d) 100.00% compared to head (315e9f3) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #113   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files            1         1           
  Lines            1         1           
=========================================
  Hits             1         1           

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[sschmidt23]

As I put in the single comment, I think it would be better to roll a new rail_base release and remove the separate rail_base install via GitHub. I'll tag a new version of rail_base now.

[sschmidt23]

Actually, given that it's hours before Thanksgiving holiday starting and people likely not being around if a new rail_base release would break something, I'll hold off on the new rail_base release.

[sschmidt23]

Looks good, thanks, feel free to merge once a new rail_base version is created.