Merge branch 'periodic-bc' into 'develop'

src/Benchmarks/BLAS/tnl-benchmark-blas.h

src/TNL/CMakeLists.txt

src/TNL/Communicators/MpiCommunicator.h

src/TNL/Communicators/NoDistrCommunicator.h

src/TNL/Devices/SystemInfo.cpp

src/TNL/DistributedContainers/DistributedSpMV.h

src/TNL/DistributedContainers/Subrange.h

src/TNL/FileName.cpp

src/TNL/FileName.h

src/TNL/FileName.hpp

src/TNL/Functions/MeshFunctionGnuplotWriter.h

src/TNL/Logger_impl.h

src/TNL/Meshes/DistributedMeshes/DistributedGrid.hpp

...Meshes/DistributedMeshes/DistributedGridSynchronizer_1D.h

...Meshes/DistributedMeshes/DistributedGridSynchronizer_2D.h

...Meshes/DistributedMeshes/DistributedGridSynchronizer_3D.h

src/TNL/Solvers/PDE/TimeDependentPDESolver.h

src/TNL/Solvers/PDE/TimeDependentPDESolver_impl.h

src/TNL/Solvers/PDE/TimeIndependentPDESolver.h

src/TNL/Solvers/PDE/TimeIndependentPDESolver_impl.h