Documentary: Los Angeles and art don't have the strongest association. (Glen Hansard at the Oscars, shaking his statue at the audience, "Make art! Make art!") But it's more of a signal-to-noise problem. The documentary The Cool School explores the lives of the founders of L.A.'s artistic "cool." Regina Hackett describes the situation: Back to L.A. in the early 1950s: Progressive artists had nothing going for themselves except themselves. New York didn't bother to spit......