title: AngularJS: Two way data binding fails if element has ngModel and a custom directive
body: <p>I made two directives to setup custom error messages in AngularJS:</p>
  
  <p>errors -> displays the error messages for a form</p>
  
  <p>error-message -> sets up a custom error message on an input</p>
  
  <p>For some reason whenever I add the <code>error-message</code> directive to the element the ng-model binding no longer works (but validation does). </p>
  
  <p>See here <a href="http://jsfiddle.net/apohl/A8Vgk/111/" rel="nofollow">http://jsfiddle.net/apohl/A8Vgk/111/</a></p>
  
  <p>Help please :)</p>