multitrait changes

[bhaller]

This branch is the long-term branch for changes to implement multiple phenotypic traits in SLiM; it will likely become SLiM 5.1 or SLiM 6.0. It is is active development, and will often not build; it is not recommended for end users until further notice.

[codecov]

Codecov Report

❌ Patch coverage is 76.19048% with 25 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.75%. Comparing base (b7d413d) to head (bb87daf).

Files with missing lines	Patch %	Lines
core/chromosome.cpp	76.92%	21 Missing ⚠️
core/chromosome.h	71.42%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #531      +/-   ##
==========================================
+ Coverage   75.83%   76.75%   +0.91%     
==========================================
  Files         114      117       +3     
  Lines       72808    79312    +6504     
  Branches    12879    14423    +1544     
==========================================
+ Hits        55217    60878    +5661     
- Misses      17591    18434     +843     

Files with missing lines	Coverage Δ
core/community.cpp	80.65% <ø> (+0.44%)	⬆️
core/community.h	100.00% <ø> (ø)
core/community_eidos.cpp	90.59% <ø> (-0.71%)	⬇️
core/genomic_element.cpp	68.88% <ø> (ø)
core/genomic_element.h	100.00% <ø> (ø)
core/genomic_element_type.cpp	82.62% <ø> (+0.63%)	⬆️
core/genomic_element_type.h	100.00% <ø> (ø)
core/haplosome.cpp	49.73% <ø> (+0.53%)	⬆️
core/haplosome.h	76.00% <ø> (-0.32%)	⬇️
core/chromosome.h	53.19% <71.42%> (+4.70%)	⬆️
... and 1 more

... and 79 files with indirect coverage changes

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