Music for sleeping and waking, walking and driving, hunting and fishing, for loitering outside a roadhouse on the haunted tundra. Okay in elevators, not great for dinner. On Caveman Wakes Up Friendship’s new album and second for Merge Records, the band’s historically capacious definition of country music grows wider still. Shambolic guitars are offset by flute pads, bleary poetry is set against a Motown rhythm section, a song about Jerry Garcia and First Lady Betty Ford fades out with a drum sol...