patch applied (packages/HaXml): Use ByteString for output (contributed by Jason Dagit, with modifications)

[Malcolm Wallace]

Mon Nov 13 10:39:35 PST 2006  Malcolm.Wallace at cs.york.ac.uk
  * Use ByteString for output (contributed by Jason Dagit, with modifications)
  There are some new signatures in Text.XML.HaXml.XmlContent:
      fpsShowXml
      fpsWriteXml
      fpsHPutXml
  for converting a document to (or doing I/O via) a ByteString.

    M ./HaXml.cabal +1
    M ./Makefile +1
    M ./src/Makefile +1
    M ./src/Makefile.nhc98 +1
    A ./src/Text/XML/HaXml/ByteStringPP.hs
    M ./src/Text/XML/HaXml/XmlContent.hs -12 +28