Implement an averaged convergence scheme for (L-)ANCopt

[awvwgk]

Will create an averaged convergence criteria for the optimization on non-smooth potential energy surfaces.

$opt
average conv=true

[codecov]

Codecov Report

Merging #394 (311e78a) into master (4403b4c) will decrease coverage by 0.08%.
The diff coverage is 0.89%.

@@            Coverage Diff             @@
##           master     #394      +/-   ##
==========================================
- Coverage   40.55%   40.47%   -0.09%     
==========================================
  Files         301      301              
  Lines       50657    50766     +109     
==========================================
  Hits        20545    20545              
- Misses      30112    30221     +109     

Impacted Files	Coverage Δ
src/optimizer.f90	0.00% <0.00%> (ø)
src/relaxation_engine.f90	0.00% <0.00%> (ø)
src/setparam.f90	23.80% <ø> (ø)
src/type/setvar.f90	79.16% <ø> (ø)
src/set_module.f90	27.84% <33.33%> (-0.08%)	⬇️

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