“Knife + Heart” is a surrealistic and zany whodunit slasher inspired by the Italian giallo genre and directed by French director Yann Gonzalez. This is his first film in the official selection. In 2013 he presented “Les Rencontres D’Après Minuit” at Critics Week, one of the parallel sections at the Cannes Festival. “Knife+Heart” is a candidate for a Palme D’Or.Did you know? Anthony Gonzalez, one half of L.A.-based French band M83, is the brother of Yann Gonzalez