Ryan Culwell, “Run Like a Bull" (Missing Piece Records)Ryan Culwell is as Texan as an El Camino with a rusty tailgate. His Panhandle roots infuse everything he does.That's as true as ever on Culwell's new album, “Run Like a Bull," the Americana singer-songwriter's third LP. It's more like his first album, “Flatlands" than his second “The Last American," though the latter had its virtues.