Merge branch 'vendor_Seitosh' into import_Seitosh

Conflicts:
	contrib/fourier/Ffcommand.f
	contrib/fourier/Ffilters.f
	contrib/fourier/Fpolesnzeroes.f

Commands executed are:

    git merge -X theirs vendor_Seitosh
    git rm contrib/fourier/*.f

Fortran files are removed intentionally, since they are not used in IFOS2D.
This way IFOS2D does not need a Fortran compiler to be installed.