Handle / & /wiki & /wiki/ URLs

https://wikia-inc.atlassian.net/browse/HG-438
How about change `createArticleData()` in article controller so it returns `{json: '', data: ''}` instead of `{json: '', article: ''}`. It's a minor change since it doesn't bring anything except removing silly looking `result.article.article` :stuck_out_tongue_winking_eye: