Add more options for surveys

* Survey period constraints
* Add abilities
* Enforce required questions
* Update survey_submssion updated_at
* Do a full match of possible answer and user reply

app/views/admin/surveys/_survey_stats.html.haml

@@ -0,0 +1,13 @@
+= javascript_include_tag "//www.google.com/jsapi", "chartkick"
+= javascript_include_tag 'chartkick'
+
+= bar_chart @survey.survey_questions.map{ |q| [q.title, q.survey_replies.count] }
+
+- @survey.survey_questions.each.with_index(1) do |survey_question, question_index|
+  .panel.panel-default
+    .panel-heading
+      = render partial: 'survey_question_title', locals:  { survey_question: survey_question, question_index: question_index }
+    .panel-body
+      - question_replies = survey_question.survey_replies
+      - if question_replies.any?
+        = pie_chart question_replies.group(:text).count, library: { legend: 'bottom', plotOptions: { pie: { dataLabels: { enabled: false }, showInLegend: true } } }