Add myself to CONTRIBUTORS.txt

CONTRIBUTORS.txt

@@ -108,3 +108,4 @@ Loren Abrams, 2012/06/19
 Eran Rundstein, 2012/06/24
 John Watson, 2012/06/27
 David Markey, 2012/07/05
+Jared Biel, 2012/07/05