Merge branch 'feature/mpi' into 'develop'

.gitlab-ci.yml

CMakeLists.txt

cmake/FindParMETIS.cmake

src/algebra/TinyMatrix.hpp

src/algebra/TinyVector.hpp

src/main.cpp

src/mesh/CMakeLists.txt

src/mesh/CellType.hpp

src/mesh/Connectivity.cpp

src/mesh/Connectivity.hpp

src/mesh/ConnectivityComputer.cpp

src/mesh/ConnectivityComputer.hpp

src/mesh/ConnectivityDescriptor.hpp

src/mesh/ConnectivityDispatcher.cpp

src/mesh/ConnectivityDispatcher.hpp

src/mesh/ConnectivityMatrix.hpp

src/mesh/GmshReader.cpp

src/mesh/GmshReader.hpp

src/mesh/IConnectivity.hpp

src/mesh/ItemOfItemType.hpp