Add zonefile generation procedure

app/views/admin/zonefile_settings/edit.haml

@@ -0,0 +1,50 @@
+%h2= t('zonefile_settings')
+%hr
+= form_for [:admin, @zonefile_setting], html: { class: 'form-horizontal' } do |f|
+  .row
+    .col-md-12
+      #domain-statuses
+        .errors
+          - if f.object.errors.any?
+            - f.object.errors.full_messages.each do |x|
+              = x
+              %br
+          - if f.object.errors.any?
+            %hr
+        .form-group
+          = f.label :origin, class: 'col-md-2 control-label'
+          .col-md-10
+            = f.text_field :origin, class: 'form-control', disabled: true
+
+        .form-group
+          = f.label :ttl, class: 'col-md-2 control-label'
+          .col-md-10
+            = f.text_field :ttl, class: 'form-control'
+
+        .form-group
+          = f.label :refresh, class: 'col-md-2 control-label'
+          .col-md-10
+            = f.text_field :refresh, class: 'form-control'
+
+        .form-group
+          = f.label :retry, class: 'col-md-2 control-label'
+          .col-md-10
+            = f.text_field :retry, class: 'form-control'
+        .form-group
+          = f.label :expire, class: 'col-md-2 control-label'
+          .col-md-10
+            = f.text_field :expire, class: 'form-control'
+
+        .form-group
+          = f.label :minimum_ttl, class: 'col-md-2 control-label'
+          .col-md-10
+            = f.text_field :minimum_ttl, class: 'form-control'
+
+        .form-group
+          = f.label :email, class: 'col-md-2 control-label'
+          .col-md-10
+            = f.text_field :email, class: 'form-control'
+
+  .row
+    .col-md-12.text-right
+      %button.btn.btn-primary=t('shared.save')

app/views/admin/zonefile_settings/index.haml

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+.row
+  .col-sm-12
+    %h2.text-center-xs= t('zonefile_settings')
+%hr
+.row
+  .col-md-12
+    .table-responsive
+      %table.table.table-hover.table-bordered.table-condensed
+        %thead
+          %tr
+            %th{class: 'col-xs-10'}
+              = t('origin')
+            %th{class: 'col-xs-2'}
+              = t('action')
+        %tbody
+          - @zonefile_settings.each do |x|
+            %tr
+              %td= link_to(x, edit_admin_zonefile_setting_path(x))
+              %td
+                = link_to(t('generate_zonefile'), admin_zonefiles_path, class: 'btn btn-xs btn-primary')