Ay cleanings

[sbillinge]

closes #63

[sbillinge]

most of the fixes had made it in in other PRs, just one I found left over.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.51%. Comparing base (cd4e94e) to head (85298af).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #79   +/-   ##
=======================================
  Coverage   98.51%   98.51%           
=======================================
  Files          20       20           
  Lines        3235     3235           
=======================================
  Hits         3187     3187           
  Misses         48       48           

Files with missing lines	Coverage Δ
tests/test_overlapcalculator.py	99.46% <100.00%> (ø)

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