Fixed app.conf and web.conf
Added avatar url to user.
Added last changed date

Added last changed date to:
- User
- Question
- Answer
- Feedback
- Review
Fixed folder structure in Data layer.
Merge pull request #52 from teugis/master

Added avatar, last changed time and fixed folder structure in data layer.
Added integration tests for FeedbackService.
Removed unnecessary includes.
Merge pull request #54 from jorisvervuurt/master

Added integration tests for FeedbackService.
Fixed use of includes.
Sorted usings.
Added integraton tests and fixed includes for UserManager
Updated class summary.
Merge pull request #55 from jorisvervuurt/master

Added integration tests for UserManager, bugfixes in FeedbackManager and UserManager.
userservice created
changed the class type of the managers to public
twitter client fixed
Twitter test client created
manual merge upstream/master
Merge pull request #56 from daanvc/master

usersevice created
manually merged conflicts