title: GSAP Animation of SVG <symbol> does not update <use>
body: <p>Why, for example animating the <code>fill</code> attribute of an element inside a <code>&lt;symbol&gt;</code> using <strong>TweenMax</strong>, has no effect but manipulating it once using <strong>jQuery</strong>'s <code>attr()</code> function has?</p>
  
  <p><strong><a href="http://codepen.io/MariusUniUlm/pen/OyXaYY" rel="nofollow">Example Codepen</a></strong>.</p>