Merge branch 'feature/crs' into 'develop'

src/main.cpp

src/mesh/CMakeLists.txt

src/mesh/CellType.hpp

src/mesh/Connectivity.cpp

src/mesh/Connectivity.hpp

src/mesh/Connectivity1D.hpp

src/mesh/Connectivity2D.hpp

src/mesh/Connectivity3D.hpp

src/mesh/ConnectivityComputer.cpp

src/mesh/ConnectivityComputer.hpp

src/mesh/ConnectivityMatrix.hpp

src/mesh/ConnectivityUtils.hpp

src/mesh/GmshReader.cpp

src/mesh/GmshReader.hpp

src/mesh/IConnectivity.hpp

src/mesh/ItemType.hpp

src/mesh/Mesh.hpp

src/mesh/MeshData.hpp

src/mesh/MeshNodeBoundary.hpp

src/mesh/SubItemValuePerItem.hpp