2.8.1:

* SaxParser, DomParser: parse_memory(), parse_chunk():
  Get the array length in bytes instead of characters, 
  to avoid weirdness. (Tim Alexeevsky, Murray Cumming)
* Node::find(): Throw an exception about invalid xpaths, 
  instead of crashing. (Caleb Epstein, Murray Cumming)
* Fix build for gcc 3.4. (Murray Cumming)