- 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/profile.py b/Lib/profile.py
index 83480cf..55118b5 100755
--- a/Lib/profile.py
+++ b/Lib/profile.py
@@ -439,10 +439,10 @@
 
     def snapshot_stats(self):
         self.stats = {}
-        for func, (cc, ns, tt, ct, callers) in self.timings.iteritems():
+        for func, (cc, ns, tt, ct, callers) in self.timings.items():
             callers = callers.copy()
             nc = 0
-            for callcnt in callers.itervalues():
+            for callcnt in callers.values():
                 nc += callcnt
             self.stats[func] = cc, nc, tt, ct, callers