Director Mary Harron has had a fascinating journey on her way to the Tribeca Film Festival. Her earlier film “American Psycho” tells the story of a demented killer. “The Notorious Bettie Page” was a historic period piece. With “Charlie Says,” a historic period piece about a demented killer, she’s completed the circle.The story of Charles Manson and his infamous crimes has been told before, most notably in the 1976 made-for-TV