Prepare add of new dual meshes and connectivities

src/language/modules/MeshModule.cpp

src/main.cpp

src/mesh/DiamondDualConnectivityBuilder.hpp

src/mesh/DiamondDualConnectivityManager.cpp

src/mesh/DiamondDualConnectivityManager.hpp

src/mesh/DiamondDualMeshBuilder.cpp

src/mesh/DiamondDualMeshBuilder.hpp

src/mesh/DiamondDualMeshManager.cpp

src/mesh/DiamondDualMeshManager.hpp

src/mesh/IConnectivity.cpp

src/mesh/IMesh.cpp

tests/mpi_test_main.cpp

tests/test_CellIntegrator.cpp

tests/test_EdgeIntegrator.cpp

tests/test_FaceIntegrator.cpp

tests/test_main.cpp