title: Html2Canvas not rendering the Font Awsome Icon in iOS
body: <p>I am using html2canvas and jspdf to generate pdf. Everthing is working fine in Desktop and Android but Font Awsome Icon is not rendering in iOS . I have created a fiddle that fiddle is working in desktop and Android but same fiddle is breaking in iOS. Please help.</p>
  
  <p>Fiddle Link :  <a href="https://jsfiddle.net/j09qd4xm/36/" rel="nofollow noreferrer">https://jsfiddle.net/j09qd4xm/36/</a></p>
  
  <pre><code>HTML :
  
  &lt;div id="target"&gt;
  
  &lt;div style="position:relative;" class="noteclasscontainer" &gt;
     &lt;span style="font-size: 60px;" class="glyphicon"&gt;&amp;#xe022;
  
        &lt;span style="color:white;font-size: 21px; position: absolute; top: 16px;left:10px;"&gt;dd&lt;/span&gt;
     &lt;/span&gt;
  &lt;/div&gt;
  
  &lt;/div&gt;
  &lt;button onclick="takeScreenShot()"&gt;to image&lt;/button&gt;
  
  JS: 
  
  window.takeScreenShot = function() {
      html2canvas(document.getElementById("target"), {
  
          width:320,
          height:220
      }).then(function (canvas) {
              document.body.appendChild(canvas);
          });
  }
  
  CSS : 
  
  button{
      display:block;
      height:20px;
      margin-top:10px;
      margin-bottom:10px;
  }
   .icon-diamond:before {
       content: "\e943";
      }
  </code></pre>
  
  <p>Version : </p>
  
  <p>Html2Canvas : 1.0.0-alpha.12</p>
  
  <p>jspdf : 1.4.1</p>