python: add python.interpreter attribute
mozart: use longDescription field
Matching hspec-hspec2

        Upgraded hspec2 to 0.6.
        Upgraded hspec to 2.0.1.
        This allows (recursively) depending on hspec2 and hspec to work nicely,
        since now hspec2 is just a re-export of hspec.
haskell-Unixutils: re-generate expression with cabal2nix
haskell-threadscope: update to version 0.2.5
haskell-github-backup: update to version 1.20141110
haskell-HDBC-odbc: update to version 2.4.0.0
haskell-HFuse: update to version 0.2.4.4
haskell-HandsomeSoup: update to version 0.3.5
haskell-cabal-cargs: update to version 0.7.4
haskell-cabal-lenses: update to version 0.4.1
haskell-cgrep: update to version 6.4.7
haskell-colors: update to version 0.2
haskell-conduit-combinators: update to version 0.3.0.4
haskell-conduit-extra: update to version 1.1.4.2
haskell-conduit: update to version 1.2.2.2
haskell-crypto-conduit: update to version 0.5.5
haskell-cufft: update to version 0.1.1.0
haskell-either: update to version 4.3.2
haskell-entropy: update to version 0.3.4.1