German Translation

Hello,

Here is my german translation - i also made some changes to the languag.json because of one typo, one "mathematical" typo and some trailing commas (which my json-tool didnt like).

I hope the translation is okay - with some segments i was unsure, what their contextual meaning is - as soon as you have updated blockchain.info with this language, ill check the site and make updates where needed.

I hope your offer from https://bitcointalk.org/index.php?topic=135336.0 is still valid - if so, please send them to: 1B75HssFTpQRnzB8RR8kU5GH8p8XoPzppY