Merge branch 'develop' into feature/Navier-Stokes

src/language/algorithms/AcousticSolverAlgorithm.cpp

src/language/algorithms/AcousticSolverAlgorithm.hpp

src/language/modules/SchemeModule.cpp

src/mesh/DiamondDualConnectivityBuilder.cpp

src/mesh/SubItemValuePerItem.hpp

src/output/VTKWriter.hpp

src/scheme/AcousticSolver.hpp

src/scheme/AcousticSolverType.hpp

src/scheme/DirichletBoundaryConditionDescriptor.hpp

src/scheme/FourierBoundaryConditionDescriptor.hpp

src/scheme/IBoundaryConditionDescriptor.hpp

src/scheme/NeumannBoundaryConditionDescriptor.hpp