Update footer with the correct logos

Author: dpiparo

_includes/footer.html

@@ -2,11 +2,12 @@
 <table id="navtable">
 <tr>
 <td><a href="https://cern.ch">           <img src="{{'/assets/images/cern-logo-large.png'      | relative_url}}" width=50>  </a></td>
+<td><a href="https://www.europa.eu">     <img src="{{'/assets/images/eu.jpg'                   | relative_url}}" width=80>  </a></td>
 <td><a href="https://fnal.gov">          <img src="{{'/assets/images/FNAL-logomark.png'        | relative_url}}" width=50>  </a></td>
-<td><a href="https://www.unl.edu">       <img src="{{'/assets/images/nebraska-n.jpg'           | relative_url}}" width=50>  </a></td>
 <td><a href="https://www.gsi.de">        <img src="{{'/assets/images/GSI_Logo_rgb.png'         | relative_url}}" width=80>  </a></td>
-<td><a href="https://ucsd.edu">          <img src="{{'/assets/images/UCSanDiegoLogo-Black.png' | relative_url}}" width=175> </a></td>
+<td><a href="https://www.uio.no">        <img src="{{'/assets/images/oslo-university.svg'      | relative_url}}" width=175> </a></td>
 <td><a href="https://www.princeton.edu"> <img src="{{'/assets/images/Princeton.png'            | relative_url}}" width=175> </a></td>
+<td><a href="https://ucsd.edu">          <img src="{{'/assets/images/UCSanDiegoLogo-Black.png' | relative_url}}" width=175> </a></td>
 </tr>
 </table>