André Téchiné’s critically cherished Les roseaux sauvages is slow, patient, quiet—indeed, solemnly repressed—and, on two fronts, meticulously detailed: as a period-piece evoking the early 1960s; and, also, as a rigorous, nuanced portrait of adolescent psychologies.       The rural setting, a boarding school and its lush, leafy grounds (which includes a waterfall/river for skinny-dipping) tries “housing” […]