title: Upgrade from polymer 0.5 to 0.8
body: <p>Hello I am trying to upgrade polymerJs from <code>0.5 to 0.8</code> using bower. As we know that running <code>bower update</code> will update all of the necessary packages.</p>
  
  <p>But unfortunately it is updating to <code>0.5.5</code> not to <code>0.8</code>. Can someone please let me know what exactly the problem is or how can i achieve the upgrade ? Much appreciated. Thanks</p>