Add datasets link to footer

nlmapsweb/templates/base.html

@@ -98,6 +98,7 @@
                 <a href="{{ url_for('legal_notice') }}">Legal Notice</a>
                 <a href="{{ url_for('terms') }}">Terms of Service</a>
                 <a href="{{ url_for('contributors') }}">Contributors</a>
+                <a href="{{ url_for('datasets') }}">Datasets</a>
             </nav>
         </div>
     </body>