added a stubby controller action for response/delete for #123
added the view methods for the delete result #123
Added unit test for Response::deleteByQuizIdUserId
fixing unit test for deleteByQuizIdUserId
deleteByQuizIdUserId added ref #123
setting permissions for response/delete
finished delete function for individual results UI
unit test checking submission status as well
responses::deleteByQuizIdUserId also removing coresponding submission
Merge pull request #128 from Harvard-ATG/feature-123

Feature 123 - delete an individual's result / submission closes #123