Add human example script and some other fixes

[adamltyson]

This adds an example using the human atlas because:

• Now it's got both hemispheres
• The scale of the atlas makes it trickier to just adapt existing examples

This also fixes a typo and removes some script code in a submodule.

Sort of fixes #14

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 0.00%. Comparing base (c42d3f1) to head (7c5b8d3).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #40 +/- ## ===================================== Coverage 0.00% 0.00% ===================================== Files 5 5 Lines 285 282 -3 ===================================== + Misses 285 282 -3 ```

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