patch applied (cabal-install): Rearrange setup wrapper to know the cabal lib version

[Duncan Coutts]

Thu Jun  5 17:32:15 PDT 2008  Duncan Coutts <duncan at haskell.org>
  * Rearrange setup wrapper to know the cabal lib version
  It is important to know which version of the Cabal lib the setup
  script has been built with because it affects what flags we can pass
  to it. So we now store the version in dist/setup/setup.version.
  If the version number changes then we rebuild the setup binary.

    M ./Hackage/SetupWrapper.hs -80 +111

View patch online:
http://darcs.haskell.org/cabal-install/_darcs/patches/20080606003215-adfee-cf1ba334645b52dbeb0625f012a799745e5cde4c.gz