webcomponents/customelements.io — pull request #337 by luanmuniz (2014-10-27 17:57:28+00:00)
Title: Add target _blank to external links

We need to add target=_blank to all external links. The firefox marketplace need this to approve the site as an app.
The Firefox OS don't have the "Back" button by default, so they ask to add one or add target=_blank, that way the user can navigate through the app without been trapped.