Cannes: Twenty-five years after his debut feature, the Argentinian director offers an unexpected and satisfying continuation. In some respects, “La Libertad Doble” is a classic sequel that restages the first installment’s greatest hits before introducing new characters and raising the stakes — but in this case, “greatest hits,” “new characters,” and “raising the stakes” are all a little different. Premiering when writer/director Lisandro Alonso was all of 26, 2001’s “La Libertad” was the most