Ladj Ly Palme d'Or nominee Ladj Ly was one of the surprises of this year's Cannes Film Festival selection. The director from Clichy-Montfermei - a deprived suburb of Paris where unemployment is some 40 percent -founded a free film school in the area aimed at opening up the world of cinema to students from diverse backgrounds. IMAGES of students from Kourtrajmé Film School working on a short film, "Signature" about removing graffiti, for their end-of-year project