“The Founder” (***1/2 out of four) was a thoroughly winning and entertaining story about the start of the McDonald’s corporation and how an ambitious huckster (Michael Keaton) bought the McDonald’s restaurant chain from two naive brothers and eventually edged them out but turned it from a small-town eatery to a global phenomenon. Keaton’s outstanding performance dominates this exceptional story of big business, capitalism, and the American dream. That such an unlikeable character could form such a likeable and accessible story is a testament to Keaton and director John Lee Hancock.