Introducing timeoutable to timeout sessions without activity.

test/rails_app/app/controllers/users_controller.rb

@@ -4,4 +4,14 @@ class UsersController < ApplicationController
   def index
     user_session[:cart] = "Cart"
   end
+
+  def new
+    user_session['last_request_at'] = 11.minutes.ago.utc
+    render :text => 'New user!'
+  end
+
+  def edit
+    user_session['last_request_at'] = 9.minutes.ago.utc
+    render :text => 'Edit user!'
+  end
 end