Resolve namespaces in DOMElement methods

[ThomasWeinert]

Overload all methods that have an *NS version to resolve namespaces using the document defined namespaces. Some are already implemented. Add the missing methods.

getAttribute()
getAttributeNode()
getElementsByTagName()
hasAttribute()
removeAttribute()
setAttribute()
setAttributeNode()
setIdAttribute()

[ThomasWeinert]

Implemented and Tested, except setAttributeNode().

Here is a setAttributeNodeNS() but it takes the same argument - an attribute node.