Jackson SOAP module

It would be great to have a module to supplement jackson-datatype-xml that made generating and handling SOAP messages easier.

While it's possible to wrangle this in place with a combination of jaxb and jackson, it would be easier to simply say, 'here's my class annotated with jackson annotations (or generated from xic), please wrap them in a soap envelope.

As a rough roadmap here are some features:

* Create a SOAP message with a given object as the body
* Create a soap message with given body and headers
* Read an xml response and determine if it's a soap fault
* Read an xml response and map the soap body to an object.

Thank you.