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

testsuite/lpgf/phrasebook/PhrasebookDut.gf

@@ -0,0 +1,10 @@
+--# -path=.:present
+
+concrete PhrasebookDut of Phrasebook = 
+  GreetingsDut,
+  WordsDut ** open 
+    SyntaxDut,
+    Prelude in {
+
+
+}