Article: Don't hardcode <img> tags on redirect page

* Created a ResourceLoader module for redirect page styling.
* Fixed a couple of bugs in Article code.

Keeping two of the old files for a while because they might still be
referenced by something (bug 69277 comment 11).

Bug: 69277
Change-Id: I8fa565833545e41d0232101566da8c5ffa850e36
Merge "Article: Don't hardcode <img> tags on redirect page"