 what we've done:</p>
  <ol>
    <li>
      After obtaining the Cursor from <code>mDbHelper.fetchAllNotes()</code>, we 
      use an Activity method called
      <code>startManagingCursor()</code> that allows Android to take care of the
      Cursor lifecycle instead of us needing to worry about it. (We will cover the implications
      of the lifecycle in exercise 3, but for now just know that this allows Android to do some
      of our resource management work for us.)</li>
    <li>
      Then we create a