Show images in comments

https://wikia-inc.atlassian.net/browse/HG-430

This is temporary workaround so we can display images in comments. It parses <figure> element, gets data-params from <img> and creates new figures based on that. Clicking on images will open File page instead of lightbox.

This has to be refactored starting from modifying the API response.
I have a briliant idea:
```js
href = '%@%@:%@'.fmt(
    Mercury.wiki.articlePath,
    Em.getWithDefault(Mercury, 'wiki.namespaces.6', 'File'),
    Image.name
);
```