Fix footer and update Related Tools verbiage

issue-572: update Related Tools verbiage (#572), Fix footer to display branding as needed (#620)

ols-web/src/main/resources/templates/index.html

@@ -84,11 +84,10 @@ <h4>
                         <a href="https://www.ebi.ac.uk/spot/ontology/">Related Tools</a>
                     </h4>
                     <p class="about">
-                        In addition to OLS the SPOT team also provides the OxO, Zooma and Webulous services.
-                        <a href="//www.ebi.ac.uk/spot/oxo">OxO</a> provides cross-ontology mappings between terms from
-                        different ontologies. <a href="//www.ebi.ac.uk/spot/zooma">Zooma</a> is a service to assist in
-                        mapping data to ontologies in OLS and <a href="//www.ebi.ac.uk/spot/webulous">Webulous</a> is a
-                        tool for building ontologies from spreadsheets.
+                        In addition to OLS, we also provide ontology tools and services such as
+                        <a href="https://www.ebi.ac.uk/spot/oxo/">OxO</a>,
+                        <a href="https://www.ebi.ac.uk/spot/zooma/">Zooma</a>, and
+                        <a href="https://www.ebi.ac.uk/spot/ontostring/">OntoString</a>.
                     </p>
                 </div>
                 <div class="small-4 columns">