Imgur link support?

[rdougan]

I made a category for RKLink so you can detect Imgur links and get the proper image and thumbnail URLs. I'm not sure if it should be in the repo, but it may be useful for someone.

https://gist.github.com/rdougan/aefbe206c48e9dde1f51

[rickharrison]

This will be hugely useful. Thanks!