[Haskell-cafe] plugins can not be installed in ghc 6.10.1

[Don Stewart]

agocorona:
>    Do really pluigins needs Cabal (>=1.4 && <1.5) ???
>    C:\Documents and Settings\Administrator>cabal install plugins
>    Resolving dependencies...
>    cabal: dependencies conflict: ghc-6.10.1 requires Cabal ==1.6.0.1 however
>    Cabal-1.6.0.1 was excluded because plugins-1.3.1 requires Cabal ==1.4.*


Patches welcome. Probably switching to the 1.6 API won't be too hard.