As a certified judge on one of the most well-respected circuits around, Casey Costigan says you need to know about four things to be successful — brisket, pulled pork, ribs and chicken. The 49-year-old Bloomington resident is not only a recently appointed circuit judge in central Illinois’ 11th Circuit. He’s also a certified judge and cook-off contestant for the Kansas City Barbeque Society — a group that bills itself as “the world’s largest organization of barbeque and grilling …