[XML-SIG] Another SAX Suggestion

[Lars Marius Garshol]

* Walter Underwood
| 
| I wouldn't mind having a stderr error handler provided as part of
| the module, with sample code that uses that error handler.

We've got it already, except for the sample error code. 
 
| Also along this line, does the SAX adaptor for expat catch all
| exceptions raised in a handler? 

So far, what it does is to call parse and if that returns an error
code, the error message is resolved and passed to
ErrorHandler.fatalError and parsing stops.

If this is bad then please let me know and I'll fix it (or accept
patches). 

--Lars M.