QtXML to be replaced by QXmlStreamReader and QXmlStreamWriter

[samuelfmlourenco]

According to the documentation, the QtXML library is no longer updated, and QXmlStreamReader and QXmlStreamWriter libraries should be used instead of QDomDocument. Citing the documentation:

"Note that the module will not receive additional features anymore. For reading or writing XML documents iteratively (SAX), we recommend using Qt Core's QXmlStreamReader and QXmlStreamWriter classes. The classes are both easier to use and more compliant with the XML standard."