Big Change Is Bearing Down On Small Town; College Gets Rich Graduate To Pump Some Money Into the Old Place
Pleasant Rowland, founder of American Doll company, has vision for Aurora, NY, town which home of Wells College but is succumbing to declining economy; Rowland has purchased several properties, and she and Wells propose to form foundation intended to bolster economic activity in Aurora; foundation would receive infusion of cash and own properties, incurring all losses and paying taxes on them; residents were skeptical of motive for benevolence, but she allayed fears at town meeting where she explained that she wanted to repay town where seeds for her doll business, which she eventually sold for $700 million, had been planted and said that she would take nothing in return; map; photos (M)