patch applied (packages/HaXml): New combinator ' inplace' suggested by Jeremy Shaw.

[Malcolm Wallace]

Tue May 22 09:44:18 PDT 2007  Malcolm.Wallace at cs.york.ac.uk
  * New combinator 'inplace' suggested by Jeremy Shaw.
  This new primitive combinator is more basic than 'chip' (children in
  place), since chip can be implemented in terms of inplace, but not the
  other way round.

    M ./src/Text/XML/HaXml/Combinators.hs -1 +9