patch applied (cabal-install): Make logging and verboisty a bit more consistent

[Duncan Coutts]

Mon Dec 17 16:46:04 PST 2007  Duncan Coutts <duncan at haskell.org>
  * Make logging and verboisty a bit more consistent
  Use the Distribution.Simple.Utils functions and eliminate use of printf

    M ./Hackage/Config.hs -13 +11
    M ./Hackage/Fetch.hs -11 +12
    M ./Hackage/Index.hs -2 +4
    M ./Hackage/Info.hs -24 +28
    M ./Hackage/Install.hs -14 +10
    M ./Hackage/Update.hs -2 +4