[Qexo-general] changed to xml parsing

[Per Bothner]

I checked in some changes to how XML is parsed, and specifically merged 
the NamespaceResolver class (now gone) into ParsedXMLToConsumer.  While 
doing ds I made some optimizations.  Specifically, tag and attribute 
names only cause new Strings and Symbol objects to be allocated the 
first time they are seen.  There is one more optimization that I'd like 
to try, when I have time, but first I want to make sure what I've done 
so far works.

So I'd appreciate if people who parse XML files with Qexo:
(1) check that I haven't broken anything;
(2) see if you notice any performance difference.
--
        --Per Bothner
address@hidden   http://per.bothner.com/