Add some sass

package.json

@@ -49,12 +49,15 @@
     "koa-views": "^6.1.4",
     "koa-websocket": "^4.1.0",
     "kue": "^0.11.6",
+    "mini-css-extract-plugin": "^0.4.0",
     "moment": "^2.22.1",
+    "node-sass": "^4.9.0",
     "node-uuid": "~1.4.2",
     "nodebrainz": "^2.1.1",
     "pg": "^7.4.1",
     "playmusic": "^2.3.0",
     "raven": "^2.6.0",
+    "sass-loader": "^7.0.1",
     "sequelize": "^4.37.6",
     "spotify-web-api-node": "^3.1.0",
     "style-loader": "^0.21.0",