Adds Juan Ignacio Catalano to AUTHORS

AUTHORS

@@ -53,6 +53,7 @@ John Watson <johnw@mahalo.com>
 Jonas Haag <jonas@lophus.org>
 Jonatan Heyman <jonatan@heyman.info>
 Joshua Ginsberg <jag@flowtheory.net>
+Juan Ignacio Catalano <catalanojuan@gmail.com>
 Juarez Bochi <jbochi@gmail.com>
 Kevin Tran <hekevintran@gmail.com>
 Kornelijus Survila <kornholijo@gmail.com>