Exiting Temple Emanu-El on Fifth Ave. Monday after Ed Koch’s funeral, Governor Andrew Cuomo and former President Bill Clinton shared a look. Of course, Cuomo and Hillary Clinton are potential presidential candidates in 2016. Bill Clinton spoke at Koch’s funeral, at one point, riffing on Koch’s trademark line — “How’m I doin’?” — by saying that the city is doin’ much better because of Hizzoner’s efforts.