Fixes for shared 2.6 code that implements PEP 3101, advanced string
formatting.

Includes:
 - Modifying tests for basic types to use __format__ methods, instead
   of builtin "format".
 - Adding PyObject_Format.
 - General str/unicode cleanup discovered when backporting to 2.6.
 - Removing datetimemodule.c's time_format, since it was identical
   to date_format.

The files in Objects/stringlib that implement PEP 3101 (stringdefs.h,
unicodedefs.h, formatter.h, string_format.h) are identical in trunk
and py3k.  Any changes from here on should be made to trunk, and
changes will propogate to py3k).
diff --git a/Include/abstract.h b/Include/abstract.h
index a496817..9a1003b 100644
--- a/Include/abstract.h
+++ b/Include/abstract.h
@@ -611,6 +611,13 @@
          */
 
 
+     PyAPI_FUNC(PyObject *) PyObject_Format(PyObject* obj,
+					    PyObject *format_spec);
+       /*
+	 Takes an arbitrary object and returns the result of
+	 calling obj.__format__(format_spec).
+       */
+
 /* Iterators */
 
      PyAPI_FUNC(PyObject *) PyObject_GetIter(PyObject *);