During the past decade, Christopher O’Riley has been quite busy, hosting From the Top, concertizing, and recording his adaptations of pop songs by Radiohead, Nick Drake, and Elliott Smith. But he hasn’t released an all-classical CD since a Scriabin disc in 2004. That is, until 2013, when his two-CD recording of music by that barnstormer of barnstormers and finger-buster of finger-busters, Franz Liszt, saw the light of day.