Include code of conduct on conference

app/views/conferences/_code_of_conduct.haml

@@ -0,0 +1,20 @@
+= content_for :splash_nav do
+  %li
+    = link_to 'Code of Conduct', '#',
+      data: { toggle: 'modal', target: '#modal-code-of-conduct'}
+
+- content_for :modals do
+  - cache [organization, '#CoC-modal'] do
+    .modal.fade{ id: "modal-code-of-conduct" }
+      .modal-dialog
+        .modal-content
+          .modal-header
+            %button.close{ data: { dismiss: 'modal' } }
+              %i.fa.fa-close
+            %h3.modal-title Code of Conduct
+          .modal-body
+            = markdown organization.code_of_conduct
+          .modal-footer
+            = link_to 'permalink',
+              [:code_of_conduct, organization],
+              target: '_blank'