title: Keep-alive on a single route instaead of all routes in router-view
body: <p>if keep-alive is specified to router-view as below</p>
  
  <pre><code>&lt;keep-alive&gt;
      &lt;router-view&gt;&lt;/router-view&gt;
  &lt;/keep-alive&gt;
  </code></pre>
  
  <p>then all routes are effectively cached and reloaded when that route is revisited. </p>
  
  <p>I'd like to be able to specify a keep-alive option on individual routes. </p>
  
  <p>With many  routes and only 1 or 2 that need to be kept alive wihout re-rendering caching all routes is useless</p>
  
  <p><strong>is there any method of doing so or any workaround available</strong></p>