Some people are just born for the camera and stage and storytelling. Robbie Robertson was 16 years old and a high school dropout (not because he was a ne’er-do-well stoner, but because he had a serious jones for music-making) when he sold one of his guitars to finance a train ticket from his native Toronto to Arkansas, where he joined up to become one of the “Hawks” backing noted rock & roller Ronnie Hawkins. Hawkins had first noticed Robertson playing locally when Hawkins toured in Canada, then invited him to come explore the possibilities of joining up with him in Arkansas.…