rename namespaces

Core/Element/SpecularElement.cpp

Resample/Processed/ParticleRegions.cpp

Resample/Processed/ParticleRegions.h

Resample/Processed/ProcessedSample.cpp

Resample/Slice/KzComputation.cpp

Resample/Slice/KzComputation.h

Resample/Specular/SpecularMagneticNCStrategy.h

Resample/Specular/SpecularMagneticStrategy.cpp

Resample/Specular/SpecularMagneticTanhStrategy.cpp

Resample/Specular/SpecularMagneticTanhStrategy.h

Resample/Specular/SpecularScalarStrategy.cpp

Tests/UnitTests/Core/Fresnel/KzComputationTest.cpp

Tests/UnitTests/Core/Fresnel/SpecularMagneticTest.cpp

auto/Wrap/doxygenResample.i