German language integration

[erdincay]

adding basic German language integration

• base is EN (english)
• navigation
• first page (partially)

[treefrogframework]

@erdincay Thanks! Could you translate other pages into German?

[erdincay]

@erdincay Thanks! Could you translate other pages into German?

yes, i will try to translate as much as possible step by step

[erdincay]

added translation for donations and corrected a typo

[erdincay]

the start-page has been fully translated into German

[erdincay]

the download-page has been translated into German

[treefrogframework]

@erdincay Thank you. I am very happy if you could translate the user guides as well and so I could merge it.

[erdincay]

I will add the requested translations as soon as I can, but I'm very busy at work at the moment.