Add JIF results; Estimate ellipticity using second moments

[YicunDuanUMich]

• update the code and notebook according to the master branch
• add JIF results: you can find the results in jif_related folder
• estimate ellipticity using second moments

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.16%. Comparing base (0eb412b) to head (b2eaf02).
Report is 1 commits behind head on master.

Additional details and impacted files

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##           master    #1078   +/-   ##
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  Coverage   76.16%   76.16%           
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  Files          22       22           
  Lines        3092     3092           
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  Hits         2355     2355           
  Misses        737      737           

Flag	Coverage Δ
unittests	76.16% <ø> (ø)

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[jeff-regier]

Nice