The Washington Blade reports that Ward 8 Council member Marion Barry has come out — in support of same-sex marriage, that is. The mayor-for-life made his stance known for the first time last week at a meeting of the Gertrude Stein Democratic Club, the city’s most powerful LGBT political group. During the meeting, Barry responded to a question about same-sex marriage saying, “I don’t think you should make that question a litmus test. But if…