title: How to save NSMutablearray in NSUserDefaults
body: <p>I have two <code>NSMutableArray</code>'s. They consist of images or text.
  The arrays are displayed via a <code>UITableView</code>.
  When I kill the app the data within the <code>UITableView</code> gets lost.
  How to save array in <code>UITableView</code> by using <code>NSUserDefault</code>?</p>