title: RLMException, Migration is required for object type
body: <p>I have an object <code>NotSureItem</code> in which I have three properties <code>title</code> whose name is renamed from <code>text</code> and <code>textDescription</code> which I had added later and a <code>dateTime</code> property. Now when I am going to run my app it crashes when I want to add something to these properties. It shows following statements.</p>
  
  <pre><code>'Migration is required for object type 'NotSureItem' due to the following errors:
  - Property 'text' is missing from latest object model.
  - Property 'title' has been added to latest object model.
  - Property 'textDescription' has been added to latest object model.'
  </code></pre>
  
  <p>Here is my code:</p>
  
  <pre><code>import Foundation
  import Realm
  
  class NotSureItem: RLMObject {
      dynamic var title = ""   // renamed from 'text'
      dynamic var textDescription = "" // added afterwards
      dynamic var dateTime = NSDate()
  }
  </code></pre>