patch applied (cabal-install): Move the upgrade action into the Install module

[Duncan Coutts]

Sat May 10 11:59:20 PDT 2008  Duncan Coutts <duncan at haskell.org>
  * Move the upgrade action into the Install module
  It shares most code anyway.
  Also fixes ticket #260 becuase we use the right entry point now.

    M ./Hackage/Install.hs -4 +29
    R ./Hackage/Upgrade.hs
    M ./Main.hs -2 +1
    M ./cabal-install.cabal -1

View patch online:
http://darcs.haskell.org/cabal-install/_darcs/patches/20080510185920-adfee-9fad0f5252b0d1370edef9f2dadd4dcf9f77f11b.gz