Add Basque to the RGL

src/api/CombinatorsEus.gf

@@ -0,0 +1,7 @@
+--# -path=.:alltenses:prelude:../basque
+
+resource CombinatorsEus = Combinators with 
+  (Cat = CatEus),
+  (Structural = StructuralEus),
+  (Noun = NounEus),
+  (Constructors = ConstructorsEus) ** {} ;