For decades, the City of Manchester has been home to several well-endowed institutions for the visual arts, ranging from The Currier Gallery of Art, to the century-old New Hampshire Institute of Art. But in recent years ? some say it seems like overnight ? Manchester has also become home to an exploding population of contemporary artists and craftsmen, who are attracted by low-rents and a highly supportive community. The growth of this community is challenging the city to define arts and culture in a much broader way. NHPR?S Doug MacPherson reports.