Update SWI-Prolog to version 6.4.1
Update YAP to version 6.2.2
Update YAP to version 6.2.2
Merge pull request #955 from DriesVanDaele/upstream

Update YAP to version 6.2.2
Merge pull request #954 from DriesVanDaele/master

Update SWI-Prolog to version 6.4.1
yap: add 'zlib' and 'gmp' build inputs to enable additional features
idris: re-generate with cabal2nix
haskell-acid-state: update to version 0.12.0
haskell-basic-prelude: update to version 0.3.6.0
haskell-diagrams: update to version 0.7.1.1
haskell-diagrams-lib: update to version 0.7.1
haskell-diagrams-svg: update to version 0.8.0.1
haskell-hspec: update to version 1.7.2.1
haskell-http-conduit: update to version 1.9.5
haskell-llvm-general: update to version 3.3.8.1
haskell-mwc-random: update to version 0.13.0.0
haskell-wai-app-static: update to version 1.3.2
haskell-yesod-auth: update to version 1.2.3
haskell-yesod-bin: update to version 1.2.3.3
haskell-yesod-core: update to version 1.2.4.3