add bulgarian language (still incomplete)

lib/resource/bulgarian/GrammarBul.gf

@@ -0,0 +1,15 @@
+--# -path=.:../abstract:../common:prelude
+
+concrete GrammarBul of Grammar = 
+  NounBul,
+  VerbBul,
+  SentenceBul,
+  QuestionBul,
+  PhraseBul,
+  TextX,
+  StructuralBul
+  ** {
+
+flags startcat = Phr ; unlexer = text ; lexer = text ;
+
+} ;