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

testsuite/lpgf/phrasebook/PhrasebookTha.gf

@@ -0,0 +1,11 @@
+--# -path=.:alltenses
+
+concrete PhrasebookTha of Phrasebook = 
+  GreetingsTha,
+  WordsTha
+ ** open 
+--    SyntaxTha,
+    Prelude in {
+
+
+}