Add James Pulec to CONTRIBUTORS.txt

CONTRIBUTORS.txt

@@ -183,3 +183,5 @@ Mickaël Penhard, 2015/02/15
 Mark Parncutt, 2015/02/16
 Samuel Jaillet, 2015/03/24
 Ilya Georgievsky, 2015/03/31
+Fatih Sucu, 2015/04/17
+James Pulec, 2015/04/19