hackage2nix.hs: fine-tune output generation
ng.nix: add support for building all of Hackage
cabal2nix.cabal: require hackage-db 1.11 or later
Greatly simplify the hackag2nix utility.
nix stuff now lives in the haskell-ng branch of Nixpkgs
Add support for the MPL-2.0 license.
Remove the name mangling logic that maps Haskell package names to Nix
attributes. We support names with dashes in them for quite a while now,
so the mangling isn't necessary any more.
Remove many, many post-process hooks which aren't necessary any more in the NG architecture.
Switch default compiler to 7.8.3.
Auto-generate overrides to avoid infinite recursions.