TEAMMATES/repo — pull request #2025 by LowWeiLin (2014-05-22 09:39:31+00:00)
Title: Refactoring and validation for Feedback Question/Responses #1991

Fixes Issue #1991
Fixes Issue #1862
Fixes Issue #1805 partially (still need to check for the case when the options are generated, the response matches the generated options.)

Add abstract functions to validate question details and responses.