By Johnnie Hardy For the youth of Newton County, summer has almost commenced, and high school and middle school sports will soon begin once again. But for approximately 70-75 young athletes, who recently attended the second annual Top Achievers Basketball Camp sponsored by Clements coach Karen Gibbs, they already have a leg up. These future stars received instructions from mentors such as former Newton High standout Brittany Carter - who recently transferred from the University of Georgia to Memphis - and Kasha Terry, a 2006 graduate of Georgia Tech and former McDonald's All-American in her