Help and I18N.
Translation message in messages.fr.yml.
Translation.
Translation and forms.
Forms.
I18N.
Merge and translation.
Merge branch 'master' into help

Conflicts:
	src/Innova/SelfBundle/Resources/translations/messages.fr.yml
	src/Innova/SelfBundle/Resources/views/Main/help.html.twig
	src/Innova/SelfBundle/Resources/views/Main/showHelp.html.twig
	src/Innova/SelfBundle/Resources/views/Test/start.html.twig
	src/Innova/SelfBundle/Resources/views/Trace/difficulty.html.twig