Christopher Muller, a seasoned entrepreneur, fourth-generation restaurateur and decorated educator, was named dean of Boston University’s School of Hospitality Administration by President Brown.  Muller will succeed Dean James Stamas in August when he assumes the helm of SHA, which each year prepares some 400 students – in the classroom and in the field – for management positions in hotels, food service, travel and tourism, and entertainment.   As new dean, Muller will bring to the program a decidedly holistic approach – a mix of educational, entrepreneurial and philosophical.