title: how to pass RouteData via Router.navigate in angular2
body: <p>Is there an api in agnular2 that allows passing json objects instead of string values . E.g. In <code>Router.navigate()</code> I can pass route parameters</p>
  
  <pre><code>Router.navigate('routename',[{key:stringvalue}])
  </code></pre>
  
  <p>and can retrieve it using <code>RouteParams.get(key) : string</code>.
  But this returns just string values. I need to pass the json object. </p>
  
  <p>Appreciate any pointers</p>