Add logic for data export etc.

web/app/templates/interactions/infos.html.j2

@@ -7,7 +7,7 @@ result.-->
   <div class="divider" style="margin-bottom: 10px;"></div>
   <div class="row">
     <div class="col s12">
-      <button id="show-metadata"
+      <button id="show-meta-data"
               class="waves-effect
                      waves-light
                      btn-flat