translates structure.md up to "HTML and Head Elements" section
adds complete translation draft of core/structure.md
adds german translation for index.md
Translated portfolio part 2
Merge pull request #2 from tobmaster/gh-pages

Translated portfolio part 2
update: translated to German
update: translated to German
update: adjusted the translation to a given style
update: adjusted the translation to a given style
update: adjusted the translation to a given style
update: adjusted the translation to a given style
update: adjusted the translation to a given style
Merge pull request #29 from snnd/german

German Translation for html-css-beginners Workshop with proper branch names