darcs patch: Update to latest Cabal lib API and use n... (and 1 more)

Wed Feb 13 20:13:47 GMT 2008 Duncan Coutts <duncan@haskell.org> * Update to latest Cabal lib API and use new package checking code Compiles but otherwise totally untested. Wed Feb 13 20:17:11 GMT 2008 Duncan Coutts <duncan@haskell.org> * Reject uploading the same version of a package again