wip/libzeep 3.0.3 NetBSD

Libzeep was developed to make it easy to create SOAP servers. And since working with SOAP means working with XML and no decent C++ XML library existed on my radar I've created a full XML library as well. The XML part of libzeep consists of a validating parser, a DOM(-like) node implementation, an XPath search engine and a XML writer/formatter. The validation works based on DOCTYPE definitions, XML schema support will be added in a later release.