A pdf file included in the general plugin documentation was opened through xdg-open instead of showing the general documentation in the browser specified in the preferences. This latest behaviour has been implemented
A mechanism should be found for the next version to get directly the doc from the Meshgems install directory instead of copying it because there is a risk to have outdated documentation with the current way.
1) Fix common WIN32 compilation errors.
2) Replace WNT deprecated macro definition by the WIN32.
3) Remove unnecessary test executables.
4) Make MEFISTO2D algorithm optional: try to determine f2c generator and generate C code from Fortran, otherwise MEFISTO2D is unavailable.
