Merge branch 'parunit' into develop

Core/Aggregate/DecouplingApproximationStrategy.h

Core/Aggregate/InterferenceFunction1DLattice.cpp

Core/Aggregate/InterferenceFunction1DLattice.h

Core/Aggregate/InterferenceFunction2DLattice.h

Core/Aggregate/InterferenceFunction2DParaCrystal.h

Core/Aggregate/InterferenceFunctionRadialParaCrystal.h

Core/Aggregate/ParticleLayout.cpp

Core/Aggregate/ParticleLayout.h

Core/Aggregate/SizeSpacingCorrelationApproximationStrategy.h

Core/Lattice/Lattice1DParameters.h

Core/Simulation/DecoratedLayerDWBASimulation.cpp

Core/Simulation/DecoratedLayerDWBASimulation.h

Doc/Doxygen/Doxyfile.dirgraphs

Doc/UserManual/Assemblies.tex

Doc/UserManual/BornAgainManual.tex

Doc/UserManual/GisasFoundations.tex

Doc/UserManual/Multilayers.tex

Doc/UserManual/SAS.tex

Doc/UserManual/Setup.tex

Doc/UserManual/Usage.tex