title: Convert NSString to NSDictionary separated by specific character
body: <p>I need to convert this "5?8?519223cef9cee4df999436c5e8f3e96a?EVAL_TIME?60?2013-03-21" string into dictionary. Separated by "?"</p>
  
  <p>Dictionary would be some thing like </p>
  
  <pre><code>{
      sometext1 = "5",
      sometext2 = "8",
      sometext3 = "519223cef9cee4df999436c5e8f3e96a",
      sometext4 = "EVAL_TIME",
      sometext5 = "60",
      sometext6 = "2013-03-21"
  }
  </code></pre>
  
  <p>Thank you .</p>