Merge pull request #1 from itcc-li/master

changed lib to libs
welcome message added
Merge pull request #5 from simonmeier/sprint1

welcome message added
Spelling :-)
Merge pull request #6 from simonmeier/sprint1

Spelling
Add Example fragment
merged
Merge pull request #8 from simonmeier/sprint1

Sprint1 by arthur
Merge pull request #2 from itcc-li/sprint1

get sprint1
Add abstract fragment
Add abstract tour
Merge pull request #3 from thomasE1993/sprint2

Sprint2
Merge pull request #10 from Arthur26/sprint2

Sprint2 add abstract class
Update
Merge pull request #4 from itcc-li/sprint2

Sprint2
Initial
Update
Merge pull request #5 from thomasE1993/master

Update