title: What are all the index.ts used for?
body: <p>I've been looking at a few seed projects and all the components seem to have a index.ts that exports * from that component. I can't find anywhere what it's actually used for?</p>
  
  <p>E.g <a href="https://github.com/mgechev/angular2-seed/tree/master/src/client/app/%2Bhome" rel="noreferrer">https://github.com/mgechev/angular2-seed/tree/master/src/client/app/%2Bhome</a></p>
  
  <p>Thanks</p>