LEWISTON—Concert pianist Matthew Graybil will open the Franco Center’s Piano Series season at 7 p.m. Friday, Nov. 4. One of the most popular pianists to have performed at the Franco Center, Graybil will begin the program with his arrangement of Stravinsky’s Pulcinella Suite. Beethoven’s Sonata No. 14, Opus 27 (“Moonlight”) will complete the first half…