that descendent classes can override the NodeName properly
* Fixed an AV when GetNodeName is called and there is no NodeName set
* Removed the THtmlCustomElement.NodeName property and override the GetNodeName
method instead. The hashtable of TDOMNode_NS is not used because
THtmlCustomElement uses a faster lookupsystem for tag/node-names
* Added a basic test for the htmlwriter unit
git-svn-id: trunk@12732 -
