Randomisation of starting orientations at flexref

[amjjbonvin]

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Add option to randomise starting orientations at the flexref stage to allow for docking during flexible refinement.
An example is provided for protein-glycans

Implementation for issue #722

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (8e2dff1) 75.48% compared to head (6f2c916) 75.48%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #729   +/-   ##
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  Coverage   75.48%   75.48%           
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  Files         115      115           
  Lines        8204     8204           
=======================================
  Hits         6193     6193           
  Misses       2011     2011           

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[mgiulini]

isn't it missing the example with the glycans?

[amjjbonvin]

Indeed - forgot to add those files. Fixed now