user can delete their question from profile page
add delete to question/answer page if current user
Merge branch 'master' into question-delete
fix bug where the user would be redirected to the wrong profile after deleting a question from their profile
redirect user to the root path instead of the profile path after deleting a question
fix bug where if a question is deleted, the user profile page would throw an error because the question that they have answered no longer exists
Merge pull request #9 from purple-martins-2013/question-delete

user can delete their question from profile page