DWBA diffuse reflection with cross correlation of roughness between layers, 4 new standard samples, bug in kvector.

Changed to logarithmic plots, corrected total intensity calculation and changed standard multilayer sample

Conflicts:
	App/src/TestFresnelCoeff.cpp
	Core/Core.pro

Added part for treating numerical instabilities in the recurrence relations of X, R and T (alternative conventions section) (4)

Added part for treating numerical instabilities in the recurrence relations of X, R and T (alternative conventions section) (3)

Added part for treating numerical instabilities in the recurrence relations of X, R and T (alternative conventions section) (2)

Conflicts:
	Core/Core.pro

ISingleton, IFactory and IFunctionalTest base classes. TestFactory now use them. New arguments handling in main.

Refined calculation of specular reflection/transmission in alternative convention: calculations are now numerically stable.

Conflicts:
	Core/src/OpticalFresnel.cpp

TestFresnelCoeff improved drawing of T,R fresnel coefficients for test samples, DrawHelper added drawing of sample

Conflicts:
	App/src/TestDWBAFormFactor.cpp
	App/src/TestFormFactor.cpp
	Core/inc/StochasticDiracDelta.h