The internally used DOM now fully supports namespaces according to the
recomendation "XML Namespaces 1.0". This fact alone is not very
exciting, since we only support DTDs at the moment. But namespace
support is an important prerequisite for support of XML Schema, the next
big step on our list.
Besides that, we fixed some bugs and did some GUI tuning (less "Vex",
more "Visual Editor").