patch applied (cabal): Update user guide about haddock --css --hyperlink-source --hscolour-css

[Duncan Coutts]

Tue Jul 24 09:07:42 PDT 2007  Duncan Coutts <duncan at haskell.org>
  * Update user guide about haddock --css --hyperlink-source --hscolour-css
  The haddock --css flag is new. The old --hscolour=[path] flag got split
  into two flags: --hyperlink-source and --hscolour-css=path

    M ./doc/Cabal.xml -7 +25