Custom header $columns

[sricc]

It would be nice to have access to $columns when providing custom headers so that we could do something like this (over-simplified for brevity purposes):

<table>
  <thead>
    <tr>
      <th ng-repeat="column in $columns">
        <!-- Do some custom stuff -->
        <div ng-bind="parse(column.title)"></div>
      </th>
    </tr>
  </thead>
  <tbody>
    <tr ng-repeat="data in $data">
      <td data-title="'ID'" sortable="id">{{data.id}}</td>
      <td data-title="'Name'" sortable="name">{{data.name}}</td>
    </tr>
  </tbody>
</table>

Before, it would just look for the first and use that to parse the 's.

Let me know if this is helpful or off base. Thanks.