Users can see multi-choice responses

Trello Card: https://trello.com/c/5D4WsPuo/22-users-can-respond-to-multi-choice-questions

NOTE: From the survey show page, click on "Survey responses" to view responses.

NOTE: Currently, users need to submit individual answers to individual questions. When refactoring, we plan to only require users to submit the survey once and capture all answers.
We did this under the understanding that "response" was a reserved word, however we may be wrong.