Introduced haskellPackages.extra
Merge pull request #4592 from aycanirican/haskellPackages.extra

Introduced haskellPackages.extra
systemd: include name of the unit when generating nix store path
haskell-hspec-meta: update to version 1.12.0
haskell-hspec: update to version 1.12.0
haskell-hspec2: update to version 0.5.0
haskell-monadloc-pp: update to version 0.3.1
haskell-pango: update to version 0.13.0.3
haskell-rest-gen: update to version 0.16.0.3
haskell-rethinkdb: update to version 1.15.1.0
haskell-sdl2: update to version 1.1.3
haskell-shell-conduit: update to version 4.3
haskell-template: update to version 0.2.0.10
haskell-aeson: update to version 0.8.0.2
haskell-HTF: update to version 0.12.2.1
haskell-HandsomeSoup: update to version 0.3.3
haskell-JuicyPixels-util: update to version 0.2
haskell-asn1-encoding: update to version 0.9.0
haskell-asn1-parse: update to version 0.9.0
haskell-asn1-types: update to version 0.3.0