Ger Translation + other Translation files updated..

..due to additions and changes made on Ampache since last provided Ger translation update.

Now after several problems with github and its "For every merge from original to your fork, I'll create a new commit so that if you try to make a pull request I'll put you all other commits on it to confuse everyone's reading this!" bug I've now made a generic update.

So there are no other pull requests for updating language files or something else so it should be not a problem to merge it^^