MesoCrystal test is off, new fitting examples for spheres in a lattice and corresponding changes in visitors

New Python unittest for testing IntensityData from CMake, all py examples/tests are adjusted for new getIntensityData()

Made interference function strategies independent of scalar/matrix formalism; this now enables all strategies to be used with polarization

Completed creation of mess form factor that supports polarized calculations; refactor: remove spaces before public, protected, private

MSVC:  inline functions that use static members are moved into *.cpp files to avoid undefined symbols

Moved to LayerSpecularInfo for polarized calculations (removed MagneticCoefficientsMap completely); Xcode project adapted

Moved layer matrix coefficients to unnested class (outside SpecularMagnetic) with the right interface (ILayerRTCoefficients)