Merge branch 'js-translations'

This also cleans up some lint errors

Author: mitsuhiko

package.json

@@ -55,7 +55,6 @@
     "babel-core": "5.8.33",
     "babel-gettext-extractor": "^1.0.0",
     "babel-loader": "5.3.3",
-    "po-catalog-loader": "^1.0.0",
     "chai": "3.4.1",
     "js-cookie": "2.0.4",
     "karma": "0.13.15",
@@ -66,7 +65,9 @@
     "karma-sourcemap-loader": "0.3.6",
     "karma-webpack": "1.7.0",
     "platformicons": "0.0.7",
+    "po-catalog-loader": "^1.0.0",
     "sinon": "1.17.2",
-    "sinon-chai": "2.8.0"
+    "sinon-chai": "2.8.0",
+    "sprintf-js": "^1.0.3"
   }
 }