Merge remote-tracking branch 'upstream/develop' into SetModelData

Core/Parametrization/Units.h

Core/StandardSamples/MaterialBySLDBuilder.cpp

Core/StandardSamples/MaterialBySLDBuilder.h

Tests/Functional/Core/CoreStandardTest/CMakeLists.txt

Tests/Functional/TestMachinery/StandardTestCatalogue.cpp

.../StandardSuite/HomogeneousTiNiSampleWithAbsorption.int.gz

Wrap/python/plot_utils.py

Wrap/swig/directors.i

auto/Wrap/doxygen_core.i

auto/Wrap/libBornAgainCore.py

auto/Wrap/libBornAgainCore_wrap.cpp

auto/Wrap/libBornAgainFit_wrap.cpp