Santigold has never been the type to blend in with the crowd. Even in a bevy of blonde wigs, the Philly-based alternative singer/producer sticks out in “The Keepers.” And duh, why wouldn’t she? Her vocals effortlessly glide over rapid, tribal drums and digital bleeps – the music that sheds light to the distinct darkness behind a cookie cutter, suburban Stepford family in Pleasantville, U.S.A.