Add i18next packages

Conflicts:
	package.json

package.json

@@ -69,6 +69,10 @@
     "gulp-uglify": "~1.4.2",
     "gulp-watch": "~4.3.5",
     "highlight.js": "~9.0.0",
+    "i18next": "~4.1.0",
+    "i18next-express-middleware": "~1.0.2",
+    "i18next-node-fs-backend": "~0.1.3",
+    "i18next-sprintf-postprocessor": "~0.2.2",
     "inline-attachment": "git+https://github.com/Rovak/InlineAttachment.git#2.0.3",
     "jquery": "~2.1.4",
     "jquery.cookie": "~1.4.1",