Webtest

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* fix `39 <https://bitbucket.org/ianb/webtest/issues/39>`_ Add PATCH to
acceptable methods.

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* fix `33 <https://bitbucket.org/ianb/webtest/issues/33>`_ Remove
CaptureStdout. Do nothing and break pdb

* use OrderedDict to store fields in form. See
`31 <https://bitbucket.org/ianb/webtest/issues/31>`_

* fix `38 <https://bitbucket.org/ianb/webtest/issues/38>`_ Allow to post falsey
values.

* fix `37 <https://bitbucket.org/ianb/webtest/issues/37>`_ Allow
Content-Length: 0 without Content-Type

* `fix 30 <https://bitbucket.org/ianb/webtest/issues/30>`_ bad link to pyquery
documentation

* Never catch NameError during iteration

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* added ``post_json``, ``put_json``, ``delete_json``

* fix `25 <https://bitbucket.org/ianb/webtest/issues/25>`_ params dictionary of
webtest.AppTest.post() does not support unicode values

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* improve showbrowser. fixed `23 <https://bitbucket.org/ianb/webtest/issues/23>`_

* print_stderr fail with unicode string on python2

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* Added .option() `20 <https://bitbucket.org/ianb/webtest/issues/20>`_

* Fix 21

* Full python3 compat

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* Moved TestApp to app.py

* Added selenium testing framework. See :mod:`~webtest.sel` module.