Merge pull request #188 from FHenry/develop

htdocs/admin/mailing.php

htdocs/comm/mailing/fiche.php

htdocs/core/modules/mailings/modules_mailings.php

htdocs/langs/en_US/mails.lang

htdocs/langs/en_US/projects.lang

htdocs/langs/fr_FR/mails.lang

htdocs/langs/fr_FR/projects.lang

htdocs/projet/class/project.class.php

htdocs/projet/class/task.class.php

htdocs/projet/fiche.php

htdocs/projet/tasks/document.php