It was an all 20th century program, if mostly early 20th century (Joaquin Rodrigo???s ???Concierto Andaluz??? premiered in 1967, and the guitar quartet???s encore, Manuel de Falla???s bumblebee-quick and ever-popular ???Ritual Fire Dance,??? in 1915), and there was a time when it might have been considered a first-rate pops program: it made me think of Arthur Fiedler and his emphasis on ???light c