Released new API bindings to the HackerNews API (https://github.com/HackerNews/API)

Changes/Updates:
  - Matching GHCJS implementation, all AJAX calls are tested thanks to phantomjs w/ hspec.
  - All aeson instances derived generically
  - Nix-based CI w/ travis ensures successful building on the following platforms:
     - nixpkgs-16.09
        - ghcjs-7103
        - ghc-801
     - Stackage LTS 
        - LTS 7.3

Release links:
  - http://hackage.haskell.org/package/hackernews
  - https://github.com/dmjio/hackernews

More platforms to be added for testing.

- David