Bostonist was on hand Thursday when hip hop journalist and SoleSides co-founder Jeff Chang spoke at Tufts. Jeff gave a fascinating lecture about his award winning book Can't Stop, Won't Stop: A History of the Hip Hop Generation. After the lecture, many in the crowd patiently stood in line, waiting for a chance to chat briefly with Jeff while he signed copies of his book. Jeff also asked for questions after his talk. And folks......