Add anchor / target assignment visualization notebook

[zhiqwang]

Fixing #60

[review-notebook-app]

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Codecov Report

Merging #116 (855fb59) into master (dbc1c72) will decrease coverage by 0.02%.
The diff coverage is n/a.

❗ Current head 855fb59 differs from pull request most recent head db58f63. Consider uploading reports for the commit db58f63 to get more accurate results

@@            Coverage Diff             @@
##           master     #116      +/-   ##
==========================================
- Coverage   83.56%   83.54%   -0.03%     
==========================================
  Files           8        8              
  Lines         779      784       +5     
==========================================
+ Hits          651      655       +4     
- Misses        128      129       +1     

Flag	Coverage Δ
unittests	83.54% <ø> (-0.03%)	⬇️

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Impacted Files	Coverage Δ
test/test_data_pipeline.py	100.00% <0.00%> (ø)
test/common_utils.py	53.38% <0.00%> (+0.17%)	⬆️

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