title: Ng-Table, ng-repeat on td element doesnt show column header
body: <p>I am using ng-repeat on  element in the table to show multiple columns, i have used data-title attribute to see the column header, but with ng-repeat it just shows column header for first column, but not the rest of the column,</p>
  
  <p>please check the plunker <a href="http://plnkr.co/edit/Ex0XPCCKhRzRlzkfVmhG?p=preview" rel="nofollow">http://plnkr.co/edit/Ex0XPCCKhRzRlzkfVmhG?p=preview</a> </p>
  
  <pre><code>&lt;table ng-table="tableParams" class="table"&gt;
    &lt;tr ng-repeat="user in $data"&gt;
      &lt;td data-title="'Name'"&gt;
        {{user.name}}
      &lt;/td&gt;
      &lt;td data-title="'Age'" ng-repeat="a in user.age"&gt;
        {{a}}
      &lt;/td&gt;
    &lt;/tr&gt;
  &lt;/table&gt;
  </code></pre>
  
  <p>'Age' header is not shown for all column</p>