HG-332 Linked images

Handle images that link to other articles.

Related Wikia/app change: https://github.com/Wikia/app/pull/5340

https://wikia-inc.atlassian.net/browse/HG-332
Ah, I tried again, and it won't work because the first param is the name of a property (eg. 'media'). But in this case I'm comparing the property length, and not its value.