Add surveys; custom generated by admins

Available during registration or after conference

Co-authored-by: Shyukri <shshyukriev@suse.com>
Co-authored-by: Henne <hvogel@opensuse.org>
Co-authored-by: Moises <mdeniz@suse.com>

app/views/surveys/show.html.haml

@@ -0,0 +1,24 @@
+.row
+  .col-md-10.col-md-offset-1
+    .page-header
+      %h1
+        Survey #{@survey.title}
+        - if can? :edit, @survey
+          = link_to 'Edit Survey', admin_conference_survey_path(@conference.short_title, @survey), class: 'btn btn-primary pull-right'
+      %p.text-muted
+        From:
+        = @survey.start_date
+        to
+        = @survey.end_date
+
+.row
+  .col-md-12
+    = semantic_form_for @survey_submission, url: reply_conference_survey_path(@conference.short_title, @survey) do |f|
+      - @survey.survey_questions.each.with_index(1) do |survey_question, question_index|
+        .row
+          .col-md-10.col-md-offset-1
+            - survey_reply = survey_question.survey_replies.find_by(user: current_user) || SurveyReply.new(survey_question_id: survey_question.id, user_id: current_user.id)
+            = render partial: 'admin/surveys/survey_question', locals:  { survey_question: survey_question, question_index: question_index, survey_reply: survey_reply }
+      .row
+        .col-md-10.col-md-offset-1
+          = f.submit 'Submit', class: 'btn btn-primary pull-right'