Library Exhibit Traces Impact of Isaac Newton By MALCOLM RITTER     NEW YORK (AP) -- If you asked people strolling down Fifth Avenue to name a genius, most would probably cite Albert Einstein.     "Ask them to name another one, it would be (Isaac) Newton," said Mordechai Feingold, curator of a new exhibit about the 17th-century English mathematician and physicist who transcended science to become a lasting icon in society...