Fix download link to "other files" in blob

This fix the download link in blob, example:

![gitlab](https://f.cloud.github.com/assets/965653/801276/fa35c164-ed9b-11e2-91dc-57340a71775d.jpg)

Currently this link returns us back to the same page that we find, however with this fix will begin downloading the file.

Sorry for my bad English, my native languaje is Spanish