Hermes - Doxygen HowTo

• How to update Doxygen on spilka
  ssh spilka
  sudo -i
  cd /var/www2/hermes2d/hermes2d
  git clean -dfx
  git pull
  cd doc.cpp
  doxygen ./hermes2d.lib-real.doxyfile
  doxygen ./hermes2d.lib-cplx.doxyfile