title: Angularjs ng-model inside ng-repeat via (key,val) not updating
body: <p>Here is my not working <a href="http://plnkr.co/edit/qMxUY3AhwDgI4P9lcGW8?p=preview">demo</a> </p>
  
  <pre><code>&lt;section ng-repeat="t in test"&gt;
    &lt;div ng-repeat="(key,value) in t"&gt;
      &lt;div&gt;{{key}}&lt;/div&gt;
     &lt;input type="text" ng-model="value"/&gt;
    &lt;/div&gt;
  &lt;/section&gt;
  </code></pre>
  
  <p>Model stays the same. How to sync? Please note, structure of data is important. </p>