Announcing Tornado 4.0.1

[Ben Darnell]

I am pleased to announce the release of Tornado 4.0, available from

https://pypi.python.org/packages/source/t/tornado/tornado-4.0.1.tar.gz#md5=2b28e37b95aa653369a31a440242a24a

Release notes:
http://www.tornadoweb.org/en/stable/releases/v4.0.1.html

Many thanks to everyone who contributed patches, bug reports, and feedback that went into this release!
-Ben

What's new in Tornado 4.0.1

===========================

Aug 12, 2014

------------

* The build will now fall back to pure-python mode if the C extension

  fails to build for any reason (previously it would fall back for some

  errors but not others).

* `.IOLoop.call_at` and `.IOLoop.call_later` now always return

  a timeout handle for use with `.IOLoop.remove_timeout`.

* If any callback of a `.PeriodicCallback` or `.IOStream` returns a

  `.Future`, any error raised in that future will now be logged

  (similar to the behavior of `.IOLoop.add_callback`).

* Fixed an exception in client-side websocket connections when the

  connection is closed.

* ``simple_httpclient`` once again correctly handles 204 status

  codes with no content-length header.

* Fixed a regression in ``simple_httpclient`` that would result in

  timeouts for certain kinds of errors.