Also remove some unneeded boost includes

static calcMass and calcInertia functions are now available for all geometries

second tutorial added
updated older tutorials
made tutorials also tests

If you have access to the old closed source waLBerla repository, you may restore the complete history with the following command
git fetch git@i10git.cs.fau.de:software/walberla.git 'refs/replace/*:refs/replace/*'