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 84.78261% with 35 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.87%. Comparing base (b7d413d) to head (1e54a08).

Files with missing lines	Patch %	Lines
core/chromosome.cpp	83.58%	11 Missing ⚠️
core/community_eidos.cpp	80.39%	10 Missing ⚠️
core/community.cpp	92.59%	6 Missing ⚠️
core/chromosome.h	66.66%	4 Missing ⚠️
core/genomic_element.cpp	50.00%	3 Missing ⚠️
core/genomic_element_type.cpp	92.30%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #531      +/-   ##
==========================================
+ Coverage   75.62%   76.87%   +1.25%     
==========================================
  Files         114      117       +3     
  Lines       72808    78690    +5882     
  Branches    12874    14287    +1413     
==========================================
+ Hits        55061    60494    +5433     
- Misses      17747    18196     +449     

Files with missing lines	Coverage Δ
core/community.h	100.00% <ø> (ø)
core/genomic_element.h	100.00% <ø> (ø)
core/genomic_element_type.h	100.00% <ø> (ø)
core/haplosome.cpp	49.82% <ø> (+1.31%)	⬆️
core/haplosome.h	76.00% <ø> (-0.32%)	⬇️
core/individual.cpp	60.72% <ø> (+7.53%)	⬆️
core/individual.h	32.75% <ø> (ø)
core/interaction_type.cpp	80.44% <ø> (ø)
core/interaction_type.h	90.32% <ø> (ø)
core/log_file.cpp	29.52% <ø> (ø)
... and 10 more

... and 73 files with indirect coverage changes

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