Director Hal Ashby was a prolific director in the 1970s. He made seven movies in nine years, including “Harold and Maude,” “Shampoo,” “Being There.” Ashby liked to push the limits with his movies -- past what studios thought mainstream audiences could handle. He butted heads with studio executives a lot, and never quite reached “household name” status like some of his auteur peers like Kubrick, Coppola, and Scorsese. He died in 1988 at age 59. A new documentary looks at his career.