Improved Readme

Manually merged https://github.com/Crinsane/LaravelShoppingcart/pull/311

README.md

@@ -21,7 +21,7 @@ Now you're ready to start using the shoppingcart in your application.
 
 **As of version 2 of this package it's possibly to use dependency injection to inject an instance of the Cart class into your controller or other class**
 
-## Overview
+## Table of Contents
 Look at one of the following topics to learn more about LaravelShoppingcart
 
 * [Usage](#usage)

src/Cart.php

@@ -580,6 +580,8 @@ class Cart
             'identifier' => $identifier,
             'instance'   => $this->currentInstance(),
             'content'    => serialize($content),
+            'created_at' => date('Y-m-d H:i:s'),
+            'updated_at' => date('Y-m-d H:i:s')
         ]);
 
         $this->events->fire('cart.stored');