Add wl-pprint-1.1, wl-pprint-extras-3.3, and wl-pprint-terminfo-3.4.
nix: Update to 1.4
upgrading uglify to 2.2.5, optimist to 0.3.5, upgrading source-map to 0.1.7, and adding amdefine

Fixes #337
Scala should work on all supported platforms
Add mopidy, a music server supporting spotify and the mpd protocol