separate sigma and rms

GUI/View/Realspace/RealspaceBuilder.cpp

Resample/Processed/ReSample.cpp

Resample/Slice/ProfileHelper.cpp

Resample/Specular/ComputeFluxMagnetic.cpp

Resample/Specular/ComputeFluxScalar.cpp

Sample/Interface/AutocorrelationModels.cpp

Sample/Interface/AutocorrelationModels.h

Sample/Interface/CrosscorrelationModels.cpp

Sample/Interface/LayerRoughness.h

Sample/Interface/RoughnessMap.cpp

Sim/Computation/RoughMultiLayerContribution.cpp

Tests/Unit/Sample/MultiLayerTest.cpp

auto/Wrap/libBornAgainSample.py

auto/Wrap/libBornAgainSample_wrap.cpp