release: version 4.18.0

See merge request !252

Draft: Resolve "Documentation PDF: erreurs à la compilation"

Closes #656

See merge request !251

Make a section disappear...

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IN math formulas need to put proper latex accent instructions as \acute{}

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LaTeX Warning: `!h' float specifier changed to `!ht'

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Due to malfunction of internal link removal

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Done with ImageMagick, see: https://askubuntu.com/a/1427738

- Removed for debugging and I've forgotten to put it back again

Merge branch '654-courbe-de-remous-generation-section-parametree-la-pente-de-fond-n-est-pas-copiee' into 'devel'

Resolve "Courbe de remous - génération section paramétrée : la pente de fond n'est pas copiée"

Closes #654

See merge request !250

Resolve "PAB: Erreur d'abscisses sur le profil en long"

Closes #652

See merge request !249

See https://stackoverflow.com/questions/40438037/tightlist-error-using-pandoc-with-markdown

It seems that the option -pdf was running pdflatex instead of xelatex