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

testsuite/lpgf/phrasebook/PhrasebookBul.gf

@@ -0,0 +1,9 @@
+--# -path=.:present
+
+concrete PhrasebookBul of Phrasebook = 
+  GreetingsBul,
+  WordsBul ** open 
+    SyntaxBul,
+    Prelude in {
+
+}