- 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/test/test_richcmp.py b/Lib/test/test_richcmp.py
index 9c4a7a0..72a6de8 100644
--- a/Lib/test/test_richcmp.py
+++ b/Lib/test/test_richcmp.py
@@ -131,7 +131,7 @@
             self.checkequal("gt", a, b, [False, False, False, True,  True ])
             self.checkequal("ge", a, b, [False, False, True,  True,  True ])
 
-            for ops in opmap.itervalues():
+            for ops in opmap.values():
                 for op in ops:
                     # calls __bool__, which should fail
                     self.assertRaises(TypeError, bool, op(a, b))
@@ -150,7 +150,7 @@
                             continue # the combination int, int is useless
                         ta = typea(a)
                         tb = typeb(b)
-                        for ops in opmap.itervalues():
+                        for ops in opmap.values():
                             for op in ops:
                                 realoutcome = op(a, b)
                                 testoutcome = op(ta, tb)