Doxygen changed their way of naming HTML files converted from Markdown
in the 1.9.3 release, but linking to other Markdown files is now
supported natively. No need for links to .html and the \page macro at
the top of each Markdown page.

Mesh followup

See merge request !117

It is broken and does not actually check anything.

Optimized mesh initialization by skipping entities which are completely disabled in the configuration

Added options to force the output RealType and GlobalIndexType in tnl-mesh-converter and tnl-refine-mesh

The example should be the same for both .cpp and .cu, otherwise the
output might be inconsistent (e.g. when .cpp is included, but .cu is
compiled and its output is used).

Fixed Jacobi and SOR so that code using getLinearSolver() and a distributed matrix can be compiled (even if the solvers do not work...)

Added dummy methods reduceRows, reduceAllRows, forElements, forAllElements, forRows, forAllRows to DistributedMatrix

The IsArrayType trait does not include TNL::String...

Polygonal + polyhedral mesh

See merge request !93