title: Metatags aren't displayed when set them with angularjs
body: <p>I have one problem with metatags in Angularjs.
  In my html file I have metatags with <code>content</code> property set like this 
  <code>{{ meta.siteName }}</code>, and on every route I programmatically set these tags. Everything is fine, it sets these tags properly, but whem I'm trying to send link to some page via skype/slack etc, it shows <code>{{ meta.siteName }}</code> and <code>{{ meta.description }}</code> instead of their actual values. Sorry for my bad language.</p>