Apply Javascript styleguide

package.json

@@ -41,13 +41,10 @@
     "koa-compress": "~1.0.8",
     "koa-csrf": "~2.3.0",
     "koa-favicon": "~1.2.0",
-    "koa-file-server": "~2.3.1",
     "koa-generic-session": "~1.9.0",
     "koa-helmet": "^0.2.0",
     "koa-logger": "~1.3.0",
-    "koa-mount": "~1.3.0",
     "koa-redis": "~1.0.1",
-    "koa-route": "~2.4.2",
     "koa-router": "^5.1.2",
     "koa-static": "^1.4.9",
     "koa-statsd": "~0.0.2",
@@ -70,7 +67,9 @@
     "virustotal.js": "~0.3.1"
   },
   "devDependencies": {
+    "babel-eslint": "^4.0.10",
     "eslint": "~1.2.1",
+    "eslint-config-airbnb": "0.0.8",
     "istanbul": "~0.3.18",
     "mocha": "~2.2.5",
     "nodemon": "~1.4.1",