Add CSS button class to links

app/views/layers/index.html.haml

@@ -6,5 +6,5 @@
   - @layers.each do |layer|
     %tr
       %td= link_to layer.name, layer
-      %td= link_to 'Edit', edit_layer_path(layer)
-      %td= link_to 'Delete', layer, :method => :delete, :data => { :confirm => 'Are you sure?' }
+      %td= link_to 'Edit', edit_layer_path(layer), :class => 'button'
+      %td= link_to 'Delete', layer, :method => :delete, :data => { :confirm => 'Are you sure?' }, :class => 'button'