Added feature where a survey taker must answer all questions before submitting.

Refactored the survey.rb and show.erb so each question name is only the question number and not prepended with the 'question_'
Added some classes to HTML tags to implement this feature.

Added a lot of JS to verify all questions have been answered.
Merged branch 'master' into completed_survey_validation
Merge pull request #21 from Nayshins/completed_survey_validation

Completed survey validation