Merge pull request #21 from teugis/master

Added missing method in IFeedbackService
Merge pull request #22 from teugis/master

Fixed typo
Implemented the question service
Merge pull request #23 from daanvc/master

Implemented the question service
Implemented the updatequestion manager
Merge pull request #24 from daanvc/master

Implemented the updatequestion manager
Added summary for question title.