Fluxes now declared via 'using'

Resample/Element/DiffuseElement.h

Resample/Flux/IFlux.h

Resample/Flux/ScalarFlux.h

Resample/Processed/ProcessedSample.cpp

Resample/Processed/ProcessedSample.h

Resample/Specular/SpecularMagneticStrategy.cpp

Resample/Specular/SpecularMagneticStrategy.h

Resample/Specular/SpecularScalarStrategy.cpp

Resample/Specular/SpecularScalarStrategy.h

Resample/Specular/TransitionMagneticNevot.cpp

Resample/Specular/TransitionMagneticNevot.h

Resample/Specular/TransitionMagneticTanh.cpp

Resample/Specular/TransitionMagneticTanh.h

Tests/UnitTests/Core/Sample/RTTest.cpp

auto/Wrap/doxygenResample.i