Merge pull request #1370 from chleh/improve-docu

...entation/ProjectFile/gml/surfaces/surface/element/a_p2.md

...entation/ProjectFile/gml/surfaces/surface/element/a_p3.md

...ion/ProjectFile/gml/surfaces/surface/element/i_element.md

Documentation/ProjectFile/gml/surfaces/surface/i_surface.md

Documentation/ProjectFile/gml/t_name.md

...jectFile/process/convergence_criterion/DeltaX/c_DeltaX.md

...jectFile/process/convergence_criterion/DeltaX/t_abstol.md

...tFile/process/convergence_criterion/DeltaX/t_norm_type.md

...jectFile/process/convergence_criterion/DeltaX/t_reltol.md

...ence_criterion/PerComponentDeltaX/c_PerComponentDeltaX.md

...ess/convergence_criterion/PerComponentDeltaX/t_abstols.md

...s/convergence_criterion/PerComponentDeltaX/t_norm_type.md

...ess/convergence_criterion/PerComponentDeltaX/t_reltols.md

..._criterion/PerComponentResidual/c_PerComponentResidual.md

...s/convergence_criterion/PerComponentResidual/t_abstols.md

...convergence_criterion/PerComponentResidual/t_norm_type.md

...s/convergence_criterion/PerComponentResidual/t_reltols.md

...File/process/convergence_criterion/Residual/c_Residual.md

...ctFile/process/convergence_criterion/Residual/t_abstol.md

...ile/process/convergence_criterion/Residual/t_norm_type.md