PRESS PHOTOS BY PAUL WILLISTEINThe “Luminosity” 2016 Gala celebrated the 25th anniversary of the Pennsylvania Shakespeare Festival with 2016 season preview performances by MaryJoanna Grisso (Maria) and Austin Colby (Tony) of the opening musical, “West Side Story,” as well as by other actors, including Joe Vincent (“West Side Story”), Spencer Plachy and Christopher Patrick Mullen (both “Love's