Add Phrasebook to testsuite. Move grammars into subfolders. Add run-bench script.

testsuite/lpgf/phrasebook/SentencesDan.gf

@@ -0,0 +1,8 @@
+concrete SentencesDan of Sentences = NumeralDan ** SentencesI - [NameNN] with 
+  (Syntax = SyntaxDan),
+  (Symbolic = SymbolicDan),
+  (Lexicon = LexiconDan) ** open Prelude, SyntaxDan, (P = ParadigmsDan) in {
+
+  lin NameNN = mkNP (P.mkPN "NN") ;
+
+}