PHILADELPHIA — Every day, visitors from around the world make their way to the steps of the Philadelphia Museum of Art - not necessarily for the galleries inside, but for a statue of a fictional boxer from South Philadelphia. The bronze figure of Rocky Balboa - arms raised in victory, clad in boxing trunks and boots - has become a point of pilgrimage for people around the world. For decades, the museum kept an uncomfortable distance from this kind of devotion. Now, it is embracing it - and