Update CONTRIBUTORS.txt

CONTRIBUTORS.txt

@@ -115,4 +115,5 @@ Jed Smith, 2012/07/08
 Rinat Shigapov, 2012/07/20
 Hynek Schlawack, 2012/07/23
 Paul McMillan, 2012/07/26
-Mitar, 2012/07/28
+Mitar, 2012/07/28
+Adam DePue, 2012/08/22