title: ng-checked not working angular for checkbox
body: <p>I was trying to use checkbox and bind the checked attribute using ng-checked attribute but its not working where as its working fine with ng-model attribute with checkbox type inputs.</p>
  
  <pre><code>&lt;!-- not working --&gt;
  &lt;input type="checkbox" name="checkedBox"
                         id="checkedBox11"
                         ng-checked="isChecked"&gt;
  
  &lt;!--working--&gt;
  &lt;input type="checkbox" name="checkedBox"
                         id="checkedBox21"
                         ng-model="isChecked"&gt;
  </code></pre>
  
  <p>I have created a jsbin to demonstrate the same:
  <a href="http://jsbin.com/rezijuquhe/1/edit?html,js,output" rel="noreferrer">here</a></p>