As a solo artist and with a full band, The Dead Tongues, Ryan Gustafson has crafted some of the area's best twang-tinged tunes of the past decade. Happily, he's continuing that strong streak with a new record, Unsung Passage, which comes out on May 18.Today, you can listen to "Won't Be Long," the record's first track, which premiered via Stereogum earlier today.…