added optional readstring argument to readcif (default=False)

[jwtoney]

Added optional readstring argument to readcif (default=False)

[codecov]

Codecov Report

❌ Patch coverage is 95.83333% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 40.26%. Comparing base (44c0b8e) to head (b25b191).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
molSimplify/Informatics/MOF/PBC_functions.py	95.83%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #542   +/-   ##
=======================================
  Coverage   40.26%   40.26%           
=======================================
  Files          93       93           
  Lines       30325    30327    +2     
=======================================
+ Hits        12211    12212    +1     
- Misses      18114    18115    +1     

Flag	Coverage Δ
unittests	40.26% <95.83%> (+<0.01%)	⬆️

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