Merge branch 'JK/MPI' into 'develop'

src/Benchmarks/DistSpMV/tnl-benchmark-distributed-spmv.h

src/Benchmarks/HeatEquation/HeatEquationBenchmarkProblem.h

...nchmarks/HeatEquation/HeatEquationBenchmarkProblem_impl.h

src/Benchmarks/HeatEquation/tnl-benchmark-heat-equation.h

src/Benchmarks/LinearSolvers/benchmarks.h

src/Benchmarks/LinearSolvers/tnl-benchmark-linear-solvers.h

src/Benchmarks/ODESolvers/Euler.hpp

src/Benchmarks/ODESolvers/Merson.hpp

src/Benchmarks/ODESolvers/tnl-benchmark-ode-solvers.h

...acobi/Solvers/hamilton-jacobi/tnl-direct-eikonal-solver.h

...-Jacobi/Solvers/hamilton-jacobi/tnlDirectEikonalProblem.h

...bi/Solvers/hamilton-jacobi/tnlDirectEikonalProblem_impl.h

...on-Jacobi/Solvers/hamilton-jacobi/tnlFastSweepingMethod.h

...bi/Solvers/hamilton-jacobi/tnlFastSweepingMethod1D_impl.h

...bi/Solvers/hamilton-jacobi/tnlFastSweepingMethod2D_impl.h

...bi/Solvers/hamilton-jacobi/tnlFastSweepingMethod3D_impl.h

src/Examples/flow-sw/navierStokes.h

src/Examples/flow-sw/navierStokesProblem.h

src/Examples/flow-sw/navierStokesProblem_impl.h

src/Examples/flow-vl/navierStokes.h