Quentin Tarantino is at it again in his version of “Django Unchained,” a story that has been retold many times since 1966. A memorable soundtrack, incredible cinematography,  the occasional out-of-place humor and  gratuitous violence and bloodshed display Tarantino’s style. “Django Unchained” follows “Inglorious Basterds” (2009) in  Tarantino’s series of historically-inaccurate but nevertheless thrilling tales of…