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

testsuite/lpgf/phrasebook/PhrasebookEng.gf

@@ -0,0 +1,12 @@
+--# -path=.:present
+
+concrete PhrasebookEng of Phrasebook = 
+  GreetingsEng,
+  WordsEng ** open 
+    SyntaxEng,
+    Prelude in {
+
+flags 
+  language = en_US ;
+
+}