STYLE: minor changes

- do not need STRINGIFY macros in ragel code
- remove wordPairHashTable.H and use equivalent wordPairHashes.H instead

STYLE: replace addDictOption with explicit option

 - the usage text is otherwise misleading

GIT: combine Pair/Tuple2 directories

applications/utilities/preProcessing/setAlphaField/setAlphaField.C

@@ -145,7 +145,12 @@ int main(int argc, char *argv[])
         "implicit function."
     );
 
-    #include "addDictOption.H"
+    argList::addOption
+    (
+        "dict",
+        "file",
+        "Alternative setAlphaFieldDict dictionary"
+    );
     #include "addRegionOption.H"
     #include "setRootCase.H"
     #include "createTime.H"