HBO released the trailer of Lena Dunham's "Girls" Season 3, which features lots of great life advice ("It's really liberating to say 'no' to the sh-- you hate"), a country house outside the city and Shosh's Ugg boots. Earlier this morning, Dunham posted a 15-second teaser trailer to Instagram (below), but the full-length version features Dunham twerking on a grave, so it's exponentially better. Here are some key scenes that hint at what's to come:     Hannah and Adam get back...