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

testsuite/lpgf/phrasebook/PhrasebookFin.gf

@@ -0,0 +1,9 @@
+--# -path=.:present
+
+concrete PhrasebookFin of Phrasebook = 
+  GreetingsFin,
+  WordsFin ** open 
+    SyntaxFin,
+    Prelude in {
+
+}