add ?return_to to login urls

app/helpers/application_helper.rb

@@ -13,4 +13,8 @@ module ApplicationHelper
       content_tag 'p', value, :class => key
     end
   end
+  
+  def login_path_with_return_to
+    login_path :return_to => request.request_uri
+  end
 end

app/views/layouts/items.html.haml

@@ -24,7 +24,7 @@
           == You have #{current_user.points} points.
           = link_to 'Log out', logout_path
         - else
-          = link_to login_path, :id => 'userbar-log-in' do
+          = link_to login_path_with_return_to, :id => 'userbar-log-in' do
             = image_tag auth_server_icon_url
             %span Log in
       #footer