February 6, 2018 By Stephanie Adrian   Some may say that classical art song is outdated, irrelevant to our modern times and lives. After all, it’s a musical form firmly rooted in the nineteenth century, poetry set to music, performed by an opera singer and a pianist. (Perhaps not as captivating as the latest royal romance or the outcome of the Super Bowl?) But on Saturday evening at Emory University’s Schwartz Center for the Performing Arts, mezzo-soprano Susan Graham and pianist Bradley Moore turned such provincial thinking on its ear, presenting a thematic recital that was immensely relevant. The duo took perhaps…