started Croatian, some noun declensions in place

src/api/CombinatorsHrv.gf

@@ -0,0 +1,9 @@
+--# -path=.:alltenses:prelude
+
+resource CombinatorsHrv = Combinators with 
+  (Cat = CatHrv),
+  (Structural = StructuralHrv),
+  (Constructors = ConstructorsHrv)
+    ** open MissingHrv in {}
+    
+