Refactoring the Hamilton-Jacobi solver.

examples/advection/advectionProblem.h

examples/inviscid-flow/1d/eulerProblem.h

examples/inviscid-flow/2d/eulerProblem.h

examples/narrow-band/tnlNarrowBand2D_CUDA_v4_impl.h

examples/narrow-band/tnlNarrowBand2D_CUDA_v5_impl.h

examples/narrow-band/tnlNarrowBand2D_impl.h

examples/narrow-band/tnlNarrowBand3D_CUDA_impl.h

examples/narrow-band/tnlNarrowBand3D_impl.h

...TNL/Experimental/Hamilton-Jacobi/Operators/CMakeLists.txt

.../Hamilton-Jacobi/Operators/Hamilton-Jacobi/CMakeLists.txt

...n-Jacobi/Operators/Hamilton-Jacobi/Eikonal/CMakeLists.txt

...Jacobi/Operators/Hamilton-Jacobi/Eikonal/godunovEikonal.h

.../Operators/Hamilton-Jacobi/Godunov-Eikonal/CMakeLists.txt

...perators/Hamilton-Jacobi/Godunov-Eikonal/godunovEikonal.h

...s/Hamilton-Jacobi/Godunov-Eikonal/godunovEikonal1D_impl.h

...s/Hamilton-Jacobi/Godunov-Eikonal/godunovEikonal2D_impl.h

...s/Hamilton-Jacobi/Godunov-Eikonal/godunovEikonal3D_impl.h

.../Hamilton-Jacobi/Godunov-Eikonal/parallelGodunovEikonal.h

...on-Jacobi/Godunov-Eikonal/parallelGodunovEikonal1D_impl.h

...on-Jacobi/Godunov-Eikonal/parallelGodunovEikonal2D_impl.h