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

Core/Aggregate/FTDecayFunctions.cpp

Core/Aggregate/FTDecayFunctions.h

Core/Aggregate/ILayout.h

Core/Basics/BornAgainNamespace.h

Core/Basics/ICloneable.cpp

Core/Basics/ICloneable.h

Core/Computation/ConstantBackground.cpp

Core/Computation/ConstantBackground.h

Core/Computation/DWBAComputation.cpp

Core/Computation/DWBAComputation.h

Core/Computation/DelayedProgressCounter.cpp

Core/Computation/DelayedProgressCounter.h

Core/Computation/IBackground.cpp

Core/Computation/IBackground.h

Core/Computation/IComputation.cpp

Core/Computation/IComputation.h

Core/Computation/IComputationTerm.h

Core/Computation/ParticleLayoutComputation.h

Core/Computation/ProgressHandler.cpp

Core/Computation/ProgressHandler.h