title: Watch parent scope, ng-include in typescript
body: <p>I'm trying to watch a parent property in my child module.</p>
  
  <p>I have and html like this.</p>
  
  <pre><code>&lt;div ng-include="maincontainer.selected"&gt;&lt;/div&gt;
  </code></pre>
  
  <p>And in my maincontainer I have this:</p>
  
  <pre><code>class Maincontainer {
    var:string;
    scope: ng.IScope;
    selected: String;
  
    static $inject = ['$scope'];    
  
    constructor($scope: ng.IScope) {
       this.scope = $scope;
       this.var = 'init';
       this.selected = "app/Views/ChildView.html";
    }
  }
  </code></pre>
  
  <p>I want to watch in my ChildViewController the 'var' parent property.</p>
  
  <pre><code>class ChildView {
       scope: ng.IScope;
  
       static $inject = ['$scope'];
  
       constructor($scope: ng.IScope) {
          this.scope = $scope;
  
          // Here I want to add a watch to the parent property.
       }
  }
  </code></pre>
  
  <p>Can anybody help me?</p>