Carden’s Kephart highlights playwright scene by Rob Neufeld Also see Casey Blake feature on Gary Carden in AC-T               Why don’t playwrights get bigger billing in our region’s literature?             Gary Carden has been doing landmark work in Jackson County for many years; and Andrew Gall, producer of Carden’s new play, “Outlander,” at Parkway Playhouse in Burnsville, nourishes local play…