ANN: SAX2 support for NanoXML

Anyone using NanoXML can now take full advantage of SAX2. See 
<http://www.puppethead.com/xml/>.

I have provided changes and documentation for adding full SAX2 support 
to NanoXML. The benefit of this update is support for XML namespaces. I 
have submitted my changes to the NanoXML project to be hopefully used 
in a future release. Until then feel free to use my patched version 
under the same licensing terms as NanoXML: free.