title: Angular 2 RC1: Get parameters from the initial URL used
body: <p>Some users enter my web app via invitations. so they would have a link that looks something like this: <code>https://example.com/invitaion/12345</code> where 12345 is their unique invitation number. </p>
  
  <p>When users click the link, and my AppComponent is initialized on the client side by the framework, how do I get the fact that the URL used was "invitation/*" and how do I get the invitation number? </p>