German l10n of Discourse. Works so far, but lots of fine-tuning still required.

Hello,

I've read your blog post and had some time over the weekend to come up with a first localisation of Discourse into German. German is my native language, but some translations still sound a bit awkward to me, esp. if you want it to sound like the web language, and there are a number of bugs I couldn't fix just by paraphrasing (see my discussion at http://meta.discourse.org/t/internationalization-localization/280/68). Still, I believe this is worth adding to master.

Enjoy German "Diskurs"!

Martin