Added myself as contributor for Croatian translation

Change-Id: Ibee9d41d7cadce29949c16d59a29d1901acf1a0e
diff --git a/CONTRIBUTORS.mkdn b/CONTRIBUTORS.mkdn
index 74a994d..d9624ea 100644
--- a/CONTRIBUTORS.mkdn
+++ b/CONTRIBUTORS.mkdn
@@ -34,6 +34,7 @@
 Translators:
 ------------
 * __Catalan:__ Oriol Pellicer
+* __Croatian:__ Antonio Marin
 * __Czech:__ Ondrej Zima
 * __Dutch:__ Marco Brohet, Kasper Hettinga, Sam Segers, Bart Tiemersma, Eddy Witkamp
 * __Finnish:__ Antti Leukkunen