Merge pull request #35 from daanvc/master

Fixed bug in include in question manager and added a unit test for the question manager
Updated AuthorizationHandler.

Logic for matching users will be added soon.
Added attribute for method-based user authorization.
Removed AuthorizationHandler from BaseManager.

The authorized user can now be retrieved using
AuthorizationHandler.AuthorizedUser.
Review methods in new classes, also tests
Name of unit test methods fix
Comments teun fixed
Processed comments by teugis.
Corrected typos.
Removed some unnecessary variables.
Convert outside linq
Now allows authorization of multiple user types.
Added a TODO for integration test
Revert "Added a TODO for integration test"

This reverts commit 89a859c5238ad6675b7687e8d79bb79ada9a06c9.
Added a TODO for integration test
Merge pull request #36 from Plenkske/master

Review methods in new classes, also tests
Added todos and added feedbackToken parameter

- Added todos in ReviewServiceTest class
- Added todos in AnswerManager
- Added feedbackToken to IFeedbackService, FeedbackService and
FeedbackManager
- Updated summary of feedbackToken in QuestionEntity.
Updated AuthorizationHandler.
Added AuthorizationRequired and AuthorizationOptional attributes.

User matching and user creation implementations will follow.
Updated authorization attribute classes.