Back in 2005, “Junebug” launched more than just Amy Adams’ career, though writer Angus MacLachlan has taken considerably longer to follow through on the charming, human-centric sensibility auds found so appealing about his first feature-length script. Now, nearly a decade later, the North Carolina scribe makes the transition to directing with “Goodbye to All That,” another gently relatable, regionally inclined dramedy, this one concerning a semi-oblivious husband (Paul Schneider) caught completely off-guard when his wife (Melanie Lynskey) files for divorce. While too low-concept to support an easy marketing play, this amiable indie rewards adult auds who’ve outgrown cookie-cutter romantic comedies.