There is an organic quality to the art scene in Tunis, where art grows out of the bustling, lively, chaotic energy that agitates the city’s streets and animates individuals trying to channel it into an art system. That’s not an easy feat for a scene that can’t rely on any kind of government master plan, but solely on a handful of people who have set out on a mission to build something durable. Among those in the cultural trenches, the most visib…