title: fabric.js cannot get the text aligned witht the textAlign
body: <p>I cannot get the textAlign working in fabric.js The fontSize, fontBackground work properly, but not textAlign. Am I missing something?</p>
  
  <pre><code>var canvas = new fabric.Canvas('myCanvas');
  
  $('button.addText').click(function() {
    var text = new fabric.Text($(this).siblings().val(), {
      textAlign: 'center',
      fontSize: 40
    });
    canvas.add(text);
  });
  </code></pre>