SF bug [#467336] doctest failures w/ new-style classes.

Taught doctest about static methods, class methods, and property docstrings
in new-style classes.  As for inspect.py/pydoc.py before it, the new stuff
needed didn't really fit into the old architecture (but was less of a
strain to force-fit here).
New-style class docstrings still aren't found, but that's the subject
of a different bug and I want to fix that right instead of hacking around
it in doctest.

Lib/test/test_pyclbr.py

@@ -101,7 +101,10 @@ class PyclbrTest(unittest.TestCase):
     def test_easy(self):
         self.checkModule('pyclbr')
         self.checkModule('doctest',
-                         ignore=['_isclass', '_isfunction', '_ismodule'])
+                         ignore=['_isclass',
+                                 '_isfunction',
+                                 '_ismodule',
+                                 '_classify_class_attrs'])
         self.checkModule('rfc822')
         self.checkModule('xmllib')
         self.checkModule('difflib')