patch applied (cabal-install): Rename Hackage.Index -> Hackage.RepoIndex

[Duncan Coutts]

Fri Jan 18 13:51:32 PST 2008  Duncan Coutts <duncan at haskell.org>
  * Rename Hackage.Index -> Hackage.RepoIndex
  In preperation to add Hackage.LocalIndex module

     ./Hackage/Index.hs -> ./Hackage/RepoIndex.hs
    M ./Hackage/Dependency.hs -2 +2
    M ./Hackage/List.hs -1 +1
    M ./Hackage/RepoIndex.hs -2 +2
    M ./cabal-install.cabal -1 +1