Show simple message if no elements are being show.

[diosney]

Possible places to show it:

• To the empty left space in the pagination directive
• As a replacement of md-table-container when there are no items with its own directive.

[spirospolitis]

I wanted to implement the same feature, just saying that you can easily hack around this like so:

<!-- Empty data set  -->
<md-data-table-container
  ng-show="results.length === 0">
  <table md-data-table>
    <thead>
    </thead>
    <tbody>
      <tr>
        <td class="md-title">
          No documents to show
        </td>
      </tr>
    </tbody>
  </table>
</md-data-table-container>

<!-- Non-empty data set  -->
<md-data-table-container
  ng-show="results.length > 0">
  ...
  ...