- PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;
  and .keys(), .items(), .values() return dict views.

The dict views aren't fully functional yet; in particular, they can't
be compared to sets yet.  but they are useful as "iterator wells".

There are still 27 failing unit tests; I expect that many of these
have fairly trivial fixes, but there are so many, I could use help.
diff --git a/Lib/pickle.py b/Lib/pickle.py
index b828e16..db7f512 100644
--- a/Lib/pickle.py
+++ b/Lib/pickle.py
@@ -666,7 +666,7 @@
             write(MARK + DICT)
 
         self.memoize(obj)
-        self._batch_setitems(obj.iteritems())
+        self._batch_setitems(iter(obj.items()))
 
     dispatch[DictionaryType] = save_dict
     if not PyStringMap is None: