Update de-DE translation
Language modifications
Soften default guideline for property ordering

Make it clear that different sized teams have different needs, and that
larger teams tend to get more value out of alphabetical ordering of CSS
declarations.
Change final example's comment style

A small change that moves the inline comments into the comment block
above a rule. This is the style used for normalize.css and it encourages
more descriptive comments without cluttering the declaration block.