add bulgarian language (still incomplete)

lib/resource/bulgarian/QuestionBul.gf

@@ -0,0 +1,39 @@
+concrete QuestionBul of Question = CatBul ** open ResBul, Prelude in {
+
+  flags optimize=all_subs ;
+
+  lin
+
+    QuestCl cl = {
+      s = \\t,a,p => 
+            let cls = cl.s ! t ! a ! p 
+            in table {
+              QDir   => cls ! OQuest ;
+              QIndir => "àêî" ++ cls ! ODir
+              } ---- "whether" in ExtEng
+      } ;
+      
+    QuestVP ip vp = 
+      let cl = mkClause ip.s {gn = ip.gn ; p = P3} vp
+      in {s = \\t,a,b,_ => cl.s ! t ! a ! b ! ODir} ;
+
+    QuestIAdv iadv cl = mkQuestion iadv cl ;
+
+    QuestIComp icomp np = 
+      mkQuestion icomp (mkClause (np.s ! Nom) np.a (predV auxBe)) ;
+
+    PrepIP p ip = {s = p.s ++ ip.s} ;
+
+    AdvIP ip adv = {
+      s = ip.s ++ adv.s ;
+      gn = ip.gn
+      } ;
+
+   -- IDetCN idet num ord cn = {
+   --   s = \\c => idet.s ++ num.s ++ ord.s ++ cn.s ! idet.n ! c ; 
+   --   gn = idet.gn
+   --   } ;
+
+    CompIAdv a = a ;
+
+}