add changelog entry for 0.13.1

changelog.rst

@@ -3,6 +3,16 @@ Changelog
 
 .. currentmodule:: gevent
 
+Version 0.13.1
+--------------
+
+- Fixed :class:`ssl.SSLObject` to delete events used by other greenlets when closing the instance (issue #34).
+- Fixed :func:`select <gevent.select.select>` to work recognize ``long`` arguments in addition to ``int``.
+- Fixed :meth:`Semaphore.acquire` to return ``False`` when timeout expires instead of raising :exc:`AssertionError`.
+- Fixed bogus failure in ``test__exc_info.py``.
+- Updated webchat example to use file on disk rather than in-memory sqlite database to avoid :exc:`OperationalError`.
+
+
 Version 0.13.0
 --------------