Merge pull request #1 from WOYM/master

need
Merge pull request #2 from WOYM/master

need
Interfaces für #70

Angepasste Interfaces, zu reviewen und bei Wünschen vor dem
zurückschicken Ansprechen.
Merge pull request #71 from JurSch/master

Review OK.
#38
Typo fixed
to merge
Merge pull request #75 from WOYM/merge-branch

to merge
Merge pull request #76 from JurSch/master

need
Merge pull request #3 from WOYM/master

need
next try
Merge pull request #77 from JurSch/master

Fixed Merge
Merge pull request #7 from WOYM/master

Update