title: FloatingActionButton icon animation
body: <p>I tried to implement animation of FAB icon. I made everything exactly as described in the documentation, however my icon doesn't animate. I don't know what I'm missing.</p>
  
  <p>Please take a look at codes under this <a href="https://gist.github.com/ogasimli/7cb78dc12b1d7bf94c65" rel="nofollow">Gist link</a>.</p>
  
  <p>Please help me!</p>