It’s a big year for the Independent, the art world’s favorite contemporary art fair, and its more art-historically minded sister, Independent 20th Century. On the heels of Independent’s move earlier this year from Spring Studios in Tribeca to the much larger Pier 36 on the Lower East Side, its 20th Century edition, which opens to the public today, has also relocated, shifting from its Lower Manhattan location to Marcel Breuer’s 1960s brutalist building—formerly home