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)

Added required interfaces and preliminary implementation for magnetic calculations in IInterferenceFunctionStrategy classes and DecoratedLayerDWBASimulation

Implemented cloneInvertB() on ISample classes and use a MultiLayer with inverted magnetic field for the outgoing scattering states if necessary; refactored MagneticCoefficientsMap

Added HomogeneousMagneticMaterial class to represent magnetic materials for polarized neutron scattering