CONTRIBUTED PHOTOThe Revivalists, 7 p.m. Aug. 8, Wind Creek Steel Stage. The Revivalists' fourth full-length album includes the Gold-selling No. 1 single, “Wish I Knew You.” Since forming in 2008 and performing at hundreds of underground shows, the group has had three years of back-to-back sold-out headline tours. The group includes David Shaw, lead vocals, guitar; Zack Feinberg, guitar; Andrew