Eighty years ago, horny boys read D.H. Lawrence’s Lady Chatterley’s Lover for the dirty parts where the lady gets it on with her sweaty gamekeeper. Lawrence can still compete with Internet porn if you’re in the right mood. But director Pascale Ferran hunts bigger game in her spellbinding film, which focuses on the clash between animal nature and social class, now seen as the man feeling inferior to a prettier woman (hello, Knocked Up). When Lady Constance (Marina Hands is award-worthy) first…