haskell-prelude-extras: add version 0.4
haskell-packages.nix: cosmetic
haskell-packages.nix: switch ghc-head to cabal-install 1.20.x.x
haskell-arbtt: update to version 0.8
haskell-sloane: update to version 1.7
haskell-git-annex: update to version 5.20140421
haskell-active: update to version 0.1.0.13
haskell-bifunctors: update to version 4.1.1.1
haskell-blaze-markup: update to version 0.6.1.0
haskell-c2hs: update to version 0.17.2
haskell-cereal-conduit: update to version 0.7.2.2
haskell-conduit-combinators: update to version 0.2.5
haskell-conduit-extra: update to version 1.1.0.2
haskell-conduit: update to version 1.1.1
haskell-contravariant: update to version 0.5
haskell-cuda: update to version 0.6.0.0
haskell-data-ordlist: update to version 0.4.6.1
haskell-dataenc: update to version 0.14.0.7
haskell-direct-sqlite: update to version 2.3.13
haskell-distributive: update to version 0.4.3.2