add bulgarian language (still incomplete)

lib/resource/bulgarian/VerbBul.gf

@@ -0,0 +1,21 @@
+concrete VerbBul of Verb = CatBul ** open ResBul in {
+
+  flags optimize=all_subs ;
+
+  lin
+    UseV = predV ;
+    ComplV2 v np = insertObj (\\_ => v.c2 ++ np.s ! Acc) (predV v) ;
+    ComplV3 v np np2 = 
+      insertObj (\\_ => v.c2 ++ np.s ! Acc ++ v.c3 ++ np2.s ! Acc) (predV v) ;
+
+    UseComp comp = insertObj comp.s (predV auxBe) ;
+
+    AdvVP vp adv = insertObj (\\_ => adv.s) vp ;
+
+    ReflV2 v = insertObj (\\_ => v.c2 ++ ["ñåáå ñè"]) (predV v) ;
+
+    PassV2 v = insertObj (\\a => v.s ! VPassive (aformGenNum a.gn)) (predV auxBe) ;
+
+    CompNP np = {s = \\_ => np.s ! Acc} ;
+    CompAdv a = {s = \\_ => a.s} ;
+}