Periodic Angle Padding

[cadeduckworth]

close #241

Refs:

• https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#returning-a-view-versus-a-copy
• https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.loc.html
• https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.iloc.html

[codecov[bot]]

Codecov Report

Merging #242 (adede9a) into develop (ecab235) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop     #242   +/-   ##
========================================
  Coverage    79.96%   79.96%           
========================================
  Files           13       13           
  Lines         1847     1847           
  Branches       282      282           
========================================
  Hits          1477     1477           
  Misses         280      280           
  Partials        90       90           

Impacted Files	Coverage Δ
mdpow/workflows/dihedrals.py	93.22% <100.00%> (ø)

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[cadeduckworth]

We were getting the same results with the older method, so I do not think any tests or testing values need to be changed.

[cadeduckworth]

Below is the gist/notebook showing the implementation of the .copy() method used in individual steps with examples and quick tests:

https://gist.github.com/cadeduckworth/58e687f93a3612cf680c660f3181f13e

EDIT: @orbeckst

[cadeduckworth]

@orbeckst requested changes addressed