Add hspec-checkers.
haskellPackages.ihaskell: apply compile patch
blender: Update to 2.72b
nodejs: update packages
Merge pull request #4617 from jkarni/master

Add hspec-checkers.
Merge pull request #4613 from edwtjo/ihaskell-quickfix

ihaskell: apply classy prelude patch
haskell-mtl: update 2.1.x branch to version 2.1.3.1
haskell-concrete-typerep: disable test suite to avoid spurious failures

http://hydra.cryp.to/build/209703/nixlog/1/raw
haskell-hspec-checkers: re-generate expression with cabal2nix
haskell-persistent-postgresql: update to version 2.1.0.1
haskell-persistent: update to version 2.1.0.1
haskell-pipes-attoparsec: update to version 0.5.1.1