Europeans leaders have called for a “multi-speed Europe” at a mini-summit at the Palace of Versailles. Francois Hollande, the French president, joined Angela Merkel, Germany’s Chancellor, to say that some stronger countries should be able to move quicker than others. Unidad, coordinación y competitividad para lograr más crecimiento, empleo y bienestar en la #UE; nuestras prioridades…