Netflix has teamed with studio RadicalMedia to produce “What Happened, Miss Simone?”, a documentary about the legendary singer and pianist from filmmaker Liz Garbus slated to debut worldwide on the streamer in 2015. Nina Simone — a classically trained pianist, dive-bar chanteuse and black-power icon dubbed the “High Priestess of Soul” — died in 2003 at 70. “I’m thrilled that Netflix has embraced the incredible...