Update annotation docs for German
Update annotation docs for German

- minor formatting fixes
- remove STTS tags not used in Tiger
- update list of dependency relations to match tiger2dep

spacy-io/spaCy,honnibal/spaCy,spacy-io/spaCy,explosion/spaCy,explosion/spaCy,honnibal/spaCy,explosion/spaCy,spacy-io/spaCy,explosion/spaCy,honnibal/spaCy,explosion/spaCy,spacy-io/spaCy,explosion/spaCy,honnibal/spaCy,spacy-io/spaCy,spacy-io/spaCy