title: $watch ngModel from inside directive using isolate scope
body: <p>I am trying to watch my model value from inside my linking function.</p>
  
  <pre><code>scope.$watch(attrs.ngModel, function() {
         console.log("Changed"); 
      });
  </code></pre>
  
  <p>When I change the model value inside my controller, the $watch function is not triggered.</p>
  
  <pre><code>$scope.myModel = "ACT";
  
  $timeout(function() {
     $scope.myModel = "TOTALS"; 
  }, 2000);
  </code></pre>
  
  <p>Fiddle: <a href="http://jsfiddle.net/dkrotts/BtrZH/4/" rel="noreferrer">http://jsfiddle.net/dkrotts/BtrZH/4/</a></p>
  
  <p>What am I missing here?</p>