Gershwin prizewinner Stevie Wonder-ful, as Tony Bennett likes to call him. The last time Stevie Wonder played in town, his venue was the Lincoln Memorial. Before that, it was the Verizon Center. But last night, the room was considerably smaller, and the music exponentially more unique. At the Library of Congress’s Coolidge Auditorium, the overachieving 58-year-old pop/R&B legend, Rock and Roll Hall-of-Famer, Kennedy Center Honoree, and 25-time Grammy-winner led a reduced orchestra in the…