[XmlProvider constructors] Order of elements is not respected (closes #580)
[XmlProvider constructors] Order of elements is not respected (closes #580)
[XmlProvider constructors] Support the Items|Item optimization (closes #584) + Test json values in xml elements (closes #583)
[XmlProvider constructors] Support heterogeneous records (closes #581) + Add test with namespaces (closes #585)
Fix XmlProvider constructors on PCL 7 (closes #588)
[XmlProvider constructors] Don't allow to create invalid elements for heterogeneous arrays (closes #582)
Merge pull request #589 from ovatsus/master

Finish Xml write API