[XML-SIG] Release

[Martin v. Loewis]

> The XPath that's in PyXML doesn't need 4Suite, so it would be a matter
> of scanning diffs and double-checking.
> 
> I volunteer to re-integrate xpath.

Please go ahead. Please have a look at README.4XPath, and update it
where necessary: it should record all files that PyXML changes with
respect to 4Suite.

I think there still is the issue that the 4Suite authors want us to
integrate XPathParserBase and XPathParser unmodified, whereas PyXML
currently modifies them to use the YAPPS parser. It would be possible
to integrate it unmodified (or leave it out altogether) if the API in
xml.xpath (Evaluate, Compile) was used throughout.

Regards,
Martin