Merge pull request #970 from rbeerwerth/develop

Core/Basics/PhysicalConstants.h

Tests/ReferenceData/Core/BasicSpecularMM.int.gz

Tests/ReferenceData/Core/BasicSpecularPP.int.gz

Tests/ReferenceData/Core/MagneticCylindersMM.int.gz

Tests/ReferenceData/Core/MagneticCylindersMP.int.gz

Tests/ReferenceData/Core/MagneticCylindersPM.int.gz

Tests/ReferenceData/Core/MagneticCylindersPP.int.gz

Tests/ReferenceData/Core/MagneticRotation.int.gz

Tests/ReferenceData/Core/MagneticSpheres.int.gz

Tests/ReferenceData/Core/MagneticSpheresInMagLayerMP.int.gz

...s/ReferenceData/Core/polmagcylinders2_reference_00.int.gz

...s/ReferenceData/Core/polmagcylinders2_reference_01.int.gz

...s/ReferenceData/Core/polmagcylinders2_reference_10.int.gz

...s/ReferenceData/Core/polmagcylinders2_reference_11.int.gz

Tests/ReferenceData/Python/MagneticSpheres.int.gz