Update de.yml

right, I think I'm just about happy now... all the internal links should be in sensible places, and hopefully I've found most of my typos... In the longer texts (esp. your bios), I didn't stick word by word to the english original because sometimes that leads to very akward sentences in german, so I've just adaped the wording while keeping the meaning as well as possible.
Merge pull request #7 from mjacqu/patch-4

Update de.yml