Adding euclidean option for grit calculation

[gwaybio]

WIP - still needs tests

[codecov-commenter]

Codecov Report

Merging #44 (01fb6b7) into master (9569721) will decrease coverage by 0.10%.
The diff coverage is 75.00%.

❗ Current head 01fb6b7 differs from pull request most recent head b141f68. Consider uploading reports for the commit b141f68 to get more accurate results

@@            Coverage Diff             @@
##           master      #44      +/-   ##
==========================================
- Coverage   98.45%   98.34%   -0.11%     
==========================================
  Files          30       30              
  Lines         905      908       +3     
==========================================
+ Hits          891      893       +2     
- Misses         14       15       +1     

Flag	Coverage Δ
unittests	98.34% <75.00%> (-0.11%)	⬇️

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Impacted Files	Coverage Δ
cytominer_eval/transform/transform.py	94.73% <75.00%> (-2.41%)	⬇️

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