title: On register method for outlook-addin meeting/calendar/appointment
body: <p>This is my first time posting here.</p>
  
  <p>I have not seen this anywhere in the Office Add-in api docs but, is there a way to intercept the "register" event on a new calendar/meeting/appointement event in a javascript Add-in ?</p>
  
  <p>I want to send a request to a webserver on register/modification/delete of a calendar/meeting/appointement event inside my add-in but I don't see how I can do it.</p>
  
  <p>Thank you in advance for your reply.</p>
  
  <p>Aurelien</p>