title: Dojo GridX row/cell change listener?
body: <p>I'm using <strong>Dojo 1.9</strong> and <strong>GridX 1.2</strong>. I'd like to detect the event that given row (or cell) has been changed by the user. Then additional action would be done, for example a row would change background color and the "Save" button would be enabled. </p>
  
  <p>I was searching for the examples and in documentation, but I haven't found an example. How to register a listener reacting to edits in the grid, that would give me information what row or what cell has been edited, with the possibility of reading actual value after change?</p>