title: Angular Validation $parsers
body: <p>When we have a controller or ng-model-controller we can do </p>
  
  <pre><code>ctrl.$parsers.push(function(viewValue){ 
      ctrl.$setValidity('valid', true); 
  });
  </code></pre>
  
  <p>and in the end $digest is called automatically and validation renders.
  What if I want to validate a field on blur. and I do</p>
  
  <pre><code>element.blur(function(){ 
      [validations]
      ctrl.$setValidity('valid', false); 
  })
  </code></pre>
  
  <p>and the result don't change on html with elements ng-binded, how to render this change?</p>