By Klep Napier| Wearecritix.com CAMBRIDGE, MA.  Boston showed up big for filmmaker Josh Safdie this week as The Coolidge Corner Theatre hosted a special screening of his latest film Marty Supreme . The energy was already buzzing as the lights went down, but once the credits rolled and Safdie walked out to join the audience for an in-depth Q and A, the room shifted into something electric. For Safdie, a proud alum of Boston University’s College of Communication, the night doub