Zeep

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- The XML send to the server is no longer using ``pretty_print=True`` (484)
- Refactor of the multiref support to fix issues with child elements (489)
- Add workaround to support negative durations (486)
- Fix creating XML documents for operations without aguments (479)
- Fix xsd:extension on xsd:group elements (523)

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- Automatically import the soap-encoding schema if it is required (473)
- Add support for XOP messages (this is a rewrite of 325 by vashek)

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- Fix previous release, it contained an incorrect dependency (Mock 2.1.) due
to bumpversion :-(

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- Fix recursion error while creating the signature for a global element when
it references itself (via ref attribute).
- Update Client.create_message() to apply plugins and wsse (465)
- Fix handling unknown xsi types when parsing elements using xsd:anyType (455)

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This is a major release, and contains a number of backwards incompatible
changes to the API.

- Default values of optional elements are not set by default anymore (423)
- Refactor the implementation of wsdl:arrayType too make the API more
pythonic (backwards incompatible).
- The call signature for Client.create_message() was changed. It now requires
the service argument:

``Client.create_message(service, operation_name, *args, **kwargs)``

- Choice elements now only work with keyword arguments and raise an exception
if positional arguments are passed (439)
- Implement initial multiref support for SOAP RPC (326). This was done using
really good real-world tests from vstoykov (thanks!)
- Fix exception on empty SOAP response (442)
- Fix XSD default values for boolean types (Bartek Wójcicki, 386)

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- Implement ValueObject.__json__ for json serialization (258)
- Improve handling of unexpected elements for soap:header (378)
- Accept unexpected elements in complexTypes when strict is False
- Fix elementFormDefault/attributeFormDefault for xsd:includes (426)