Adding doxymentation for example for heat conduction in reticulate porous ceramics.

.../10_heat_conduction_reticulate_porous_ceramics/config.cfg

...ate_porous_ceramics/include/DiffusionSpace_sparseGrid.hpp

...ulate_porous_ceramics/include/HelpFunctions_diffusion.hpp

...rid/10_heat_conduction_reticulate_porous_ceramics/main.cu

...d/9_inhomogeneous_diffusion_porous_catalyst_CaCO3/main.cu