Prune small finite elements from cavity

[robertodr]

Implements removal of finite elements with too small area (<= 1.0d-04) These finite elements can cause the calculation of the S and D matrices to be numerically unstable. For example, the S matrix can end not being symmetric positive-definite. I've also split the printing of the citation and set up report into two separate functions.

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Status

• [x] Ready to go

[MinazoBot]

	1 Warning
:warning:	Consider adding supporting documentation to this change. Documentation sources can be found in the doc directory.

Generated by :no_entry_sign: Danger

[codecov[bot]]

Codecov Report

Merging #178 into release/1.2 will increase coverage by 0.12%. The diff coverage is 100%.

@@               Coverage Diff               @@
##           release/1.2     #178      +/-   ##
===============================================
+ Coverage        72.52%   72.65%   +0.12%     
===============================================
  Files               92       92              
  Lines             5668     5693      +25     
===============================================
+ Hits              4111     4136      +25     
  Misses            1557     1557

Impacted Files	Coverage Δ
include/Citation.hpp	100% <ø> (ø)	:arrow_up:
src/interface/Meddle.hpp	100% <ø> (ø)	:arrow_up:
src/cavity/GePolCavity.hpp	50% <ø> (ø)	:arrow_up:
src/bin/run_pcm.cpp	95.34% <100%> (+0.11%)	:arrow_up:
src/cavity/GePolCavity.cpp	91.17% <100%> (+0.38%)	:arrow_up:
src/interface/Meddle.cpp	68.78% <100%> (ø)	:arrow_up:
src/utils/MathUtils.hpp	98.26% <100%> (+0.24%)	:arrow_up:
api/pcmsolver.f90	100% <100%> (ø)	:arrow_up:

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[robertodr]

@ilfreddy I am merging so I can finish up a new release. You've looked at this changes in the previous PR anyway