New Atmospheres

[Schneegans]

This pull request generalizes the implementation of the Bruneton model by loading phase functions, extinction coefficients, and particle density distributions from CSV files. This allows us to simulate arbitrary particle types. In particular, we can now use Mie Theory to pre-compute the scattering behaviour of a wide variety of particle types, including for instance Martian dust.

In addition, the source code of the model has received some refactoring making it more inline with the rest of CosmoScout's source code.

Also, a lot of documentation has been added.

[coveralls]

Pull Request Test Coverage Report for Build 7707851252

• -689 of 689 (0.0%) changed or added relevant lines in 7 files are covered.
• 8 unchanged lines in 4 files lost coverage.
• Overall coverage decreased (-0.02%) to 1.147%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
plugins/csp-atmospheres/src/Atmosphere.hpp	0	1	0.0%
plugins/csp-atmospheres/src/models/bruneton/Model.hpp	0	1	0.0%
plugins/csp-atmospheres/src/Plugin.cpp	0	7	0.0%
plugins/csp-atmospheres/src/Atmosphere.cpp	0	69	0.0%
plugins/csp-atmospheres/src/models/bruneton/internal/csv.cpp	0	80	0.0%
plugins/csp-atmospheres/src/models/bruneton/Model.cpp	0	102	0.0%
plugins/csp-atmospheres/src/models/bruneton/internal/Implementation.cpp	0	429	0.0%

Files with Coverage Reduction	New Missed Lines	%
plugins/csp-atmospheres/src/models/bruneton/Model.hpp	1	0.0%
plugins/csp-atmospheres/src/models/bruneton/Model.cpp	2	0.0%
plugins/csp-atmospheres/src/Plugin.cpp	2	0.0%
plugins/csp-atmospheres/src/Atmosphere.cpp	3	0.0%

Totals
Change from base Build 7274803696:	-0.02%
Covered Lines:	193
Relevant Lines:	16825

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💛 - Coveralls

[JonasGilg]

I added some small remarks, but once they are adressed this can be merged.