add bulgarian language (still incomplete)

resource/bulgarian/LangBul.gf

@@ -0,0 +1,10 @@
+--# -path=.:../abstract:../common:prelude
+
+concrete LangBul of Lang = 
+  GrammarBul,
+  LexiconBul
+  ** {
+
+flags startcat = Phr ; unlexer = text ; lexer = text ;
+
+} ;