Refactoring: Refer to questions by number, not CSS ID
Refactoring: Split CSS & JS into files, use an include for the problem list, use uri_escape filter instead of manually escaping
Refactoring: Rename 'tab' to 'step' for clarity
30C3 Refactoring: Remove junk
create de/30c3 and de/index.html .

translations are not completed but technically they work.
fix 30c3 translation bug.
finish german translation.

https://piratenpad.de/p/translate-copywrongsEU-german
Merge pull request #20 from PPOE/feature-german

Feature german translation