Graffiti art has grown up. This decades-long evolution from vandalism to a respected art form is chronicled in the new behemoth exhibition “Beyond the Streets,” which showcases over 1,000 works by 150 artists across two expansive floors at 25 Kent in Williamsburg, Brooklyn. It’s a continuation of “Art in the Streets,” a blockbuster retrospective that was housed at the Museum of Contemporary Art, Los Angeles in 2011. The brainchild of Roger Gastman, an urban anthropologist and graffiti historian, the show comprehensively visualizes the story arc of street artists who were once considered outliers.