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Released May 22, 2015
- Disable [challenge on 401](https://github.com/flask-restful/flask-restful/commit/fe53f49bdc28dd83ee3acbeb0a313b411411e377)
by default (**THIS IS A BREAKING CHANGE**, albeit a very small one with behavior that probably no one depended upon. You can easily change this back to the old way).
- Doc fixes ([404](https://github.com/flask-restful/flask-restful/pull/404), [406](https://github.com/flask-restful/flask-restful/pull/406), [436](https://github.com/flask-restful/flask-restful/pull/436), misc. other commits)
- Fix truncation of microseconds in iso8601 datetime output ([368](https://github.com/flask-restful/flask-restful/pull/405))
- `null` arguments from JSON no longer cast to string ([390](https://github.com/flask-restful/flask-restful/pull/390))
- Made list fields work with classes ([409](https://github.com/flask-restful/flask-restful/pull/409))
- Fix `url_for()` when used with Blueprints ([410](https://github.com/flask-restful/flask-restful/pull/410))
- Add CORS "Access-Control-Expose-Headers" support ([412](https://github.com/flask-restful/flask-restful/pull/412))
- Fix class references in RequestParser ([414](https://github.com/flask-restful/flask-restful/pull/414))
- Allow any callables to be used as lazy attributes ([417](https://github.com/flask-restful/flask-restful/pull/417))
- Fix references to `flask.ext.*` ([420](https://github.com/flask-restful/flask-restful/issues/420))
- Trim support with fixes ([428](https://github.com/flask-restful/flask-restful/pull/428))
- Added ability to pass-in parameters into Resource constructors ([444](https://github.com/flask-restful/flask-restful/pull/444))
- Fix custom type docs on "Intermediate usage" and docstring ([434](https://github.com/flask-restful/flask-restful/pull/434))
- Fixed problem with `RequestParser.copy` ([435](https://github.com/flask-restful/flask-restful/pull/435))
- Feature/error bundling ([431](https://github.com/flask-restful/flask-restful/pull/431))
- Explicitly check the class type for `propagate_exceptions` ([445](https://github.com/flask-restful/flask-restful/pull/445))
- Remove min. year limit 1900 in `inputs.date` ([446](https://github.com/flask-restful/flask-restful/pull/446))