Removed some more 'get's

Core/Aggregate/ILayout.h

Core/Aggregate/ParticleLayout.cpp

Core/Aggregate/ParticleLayout.h

Core/Computation/MainComputation.cpp

Core/Computation/ParticleLayoutComputation.cpp

Core/Computation/RoughMultiLayerComputation.cpp

Core/Export/ExportToPython.cpp

Core/Multilayer/DWBADiffuseReflection.cpp

Core/Multilayer/IMultiLayerBuilder.cpp

Core/Multilayer/IMultiLayerBuilder.h

Core/Multilayer/Layer.cpp

Core/Multilayer/Layer.h

Core/Multilayer/LayoutStrategyBuilder.cpp

Core/Multilayer/MultiLayer.cpp

Core/Multilayer/MultiLayer.h

Core/Multilayer/SpecularMagnetic.cpp

Core/Multilayer/SpecularMatrix.cpp

Core/Particle/IAbstractParticle.h

Core/Particle/IParticle.cpp

Core/Particle/IParticle.h