title: Aframe animation component not removing
body: <p>I have attempted a few ways to remove the animation (from the html attribute itself):</p>
  
  <pre><code>element.components["animation__0"].remove(); 
  //above works, but has no affect on html list, just "stops" animation.  
  
  delete element.components.animation__0;
  //works, in theory but html attribute still there
  </code></pre>
  
  <blockquote>
    <p>$("#id").removeAttr("animation__0"); //results in the error below:</p>
  </blockquote>
  
  <pre><code>aframe-animation-component.js:468 Uncaught TypeError: Cannot read property '2' of null(…)
  getUnit @   aframe-animation-component.js:468
  getValidValue   @   aframe-animation-component.js:523
  getTweenValues  @   aframe-animation-component.js:584
  (anonymous function)    @   aframe-animation-component.js:601
  (anonymous function)    @   aframe-animation-component.js:594
  getTweensProps  @   aframe-animation-component.js:592
  getTweens   @   aframe-animation-component.js:614
  createAnimation @   aframe-animation-component.js:755
  animation   @   aframe-animation-component.js:784
  update  @   aframe-animation-component.js:128
  updateProperties    @   component.js:211
  value   @   a-entity.js:446
  value   @   a-entity.js:607
  attr    @   jquery.js?hash=22a0055…:8028
  removeAttr  @   jquery.js?hash=22a0055…:8068
  (anonymous function)    @   jquery.js?hash=22a0055…:7991
  each    @   jquery.js?hash=22a0055…:442
  each    @   jquery.js?hash=22a0055…:194
  removeAttr  @   jquery.js?hash=22a0055…:7990
  (anonymous function)    @   VM8102:1
  </code></pre>
  
  <p>I have also tried to flushToDOM() after deleting components etc... Didn't seem to change any html</p>
  
  <p>Code Pen: <a href="http://codepen.io/msj121/pen/yVVmvL" rel="nofollow noreferrer">http://codepen.io/msj121/pen/yVVmvL</a></p>