Ajout des unités (px)

Ne pas préciser les unités est déprécié, et affiche des messages
d'avertissement dans la console.

Merci à Christian Hesse pour le patch.
Mise à jour du numéro de version (1.0.1)
Merge branch 'v1.0.1'
Merge branch 'dev'

Conflicts:
	doc/LISEZ-MOI.mkd
	doc/README.mkd
	doc/version.txt
	gtk-3.0/gtk-widgets.css
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'
Merge branch 'dev'