title: how to pass route params in [routerLink] angular 2
body: <p>I'm trying to create an application with angular 2,And Want pass params to tag a in [routerLink],i want craete a link like this :</p>
  
  <pre><code>&lt;a href="/auth/signup?cell=1654654654"&gt;&lt;/a&gt;
  </code></pre>
  
  <p>i dont know how to pass <code>cell</code> in template...</p>