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_support.py

@@ -176,7 +176,7 @@ def run_unittest(testclass):
 # doctest driver.
 
 def run_doctest(module, verbosity=None):
-    """Run doctest on the given module.
+    """Run doctest on the given module.  Return (#failures, #tests).
 
     If optional argument verbosity is not specified (or is None), pass
     test_support's belief about verbosity on to doctest.  Else doctest's
@@ -198,5 +198,6 @@ def run_doctest(module, verbosity=None):
         f, t = doctest.testmod(module, verbose=verbosity)
         if f:
             raise TestFailed("%d of %d doctests failed" % (f, t))
+        return f, t
     finally:
         sys.stdout = save_stdout