Add new translator for Bundesgesetzblatt (Federal Law Gazette of Germany...

...)

 * It should be freely available online. Can you access it outside from Germany (see test cases)?
 * I would like to attach the pdf directly to the entry, but it didn't suceed so far (iframe, embedded pdf, ...)
 * The icon seems sometimes not to update. It might just be a dom change and not a real new page load. What was the trick here again?
 * AFAIK the end page is not available.
 * Any other comments?
I just tried it out and it didn't work on that page. Maybe the table-of-contents page (multiple) and the article page are "the same" html but just some small parts are changed or maybe just the visability of some objects are changed. The icon kind of stays the same and don't change when you click somewhere in the tree on the left. However, the action performed by clicking on that icon seems to be always the right one.