title: MVVM Light Toolkit sample with RibbonControlsLibrary
body: <p>I've just started playing the "MVVM Light Toolkit" and I'm wondering how can I merge RibbonCommand and RelayCommand
  Is there any sample that mix MVVM Light Toolkit and RibbonControlsLibrary?</p>
  
  <p>Many thanks
  Claudio</p>