update authentication system to Devise

app/views/layouts/_header.html.erb

@@ -58,7 +58,7 @@
           <li><%= link_to t(:signout), logout_path %></li>
         <% else %>
           <li><%= link_to t(:signin), login_path %></li>
-          <li><%= link_to t(:signup), new_account_path %></li>
+          <li><%= link_to t(:signup), new_user_registration_path %></li>
         <% end %>
 
       </ul>

app/views/layouts/application.html.erb

@@ -23,6 +23,12 @@
     <div id="wrap">
       <%= render 'layouts/header' %>
       <div class="container">
+        <% if notice.present? %>
+          <p class="flash alert alert-success"><%= notice %><span class="dismiss">X</span></p>
+        <% end %>
+        <% if alert.present? %>
+          <p class="flash alert alert-danger"><%= alert %><span class="dismiss">X</span></p>
+        <% end %>
         <%= yield %>
       </div>
     </div>