Margo Martindale Finds Her Comedy Groove

It’s a season to remember for actress Margo Martindale.  She and Chris Cooper are getting singled out for their performances in the newly-opened big-screen drama August: Osage County — which is no small feat considering they’re in a cast that includes Meryl Streep, Julia Roberts, Sam Shepard and Juliette Lewis.  At the same time, her CBS sitcom, The Millers, is earning critical second looks. Indeed, The Millers has improved with seasoning.  That’s a good thing, because the Greg Garcia comedy …