Add documentation references

Author: const-cloudinary

docs/themes/cloudinary/layout/layout.twig

@@ -27,7 +27,7 @@
                     <span class="icon-bar"></span>
                     <span class="icon-bar"></span>
                 </button>
-                <a class="navbar-brand" href="{{ path('index.html') }}">{{ project.config('title') }}</a>
+                <a class="navbar-brand" href="{{ path('index.html') }}">{{ project.config('title') }} v{{ project.versions[0] }}</a>
             </div>
             <div class="collapse navbar-collapse" id="navbar-elements">
                 <ul class="nav navbar-nav">
@@ -39,6 +39,7 @@
                     <!--li><a href="{{ path('traits.html') }}">Traits</a></li--CLD_MOD-->
                     <li><a href="{{ path('doc-index.html') }}">Index</a></li>
                     <li><a href="{{ path('search.html') }}">Search</a></li>
+                    <li><a href="/documentation/sdks/php/">PHP SDK Reference</a></li>
                     <li><a href="https://cloudinary.com/documentation/php2_integration" target="_blank">SDK User Guide</a></li>
                 </ul>
             </div>
@@ -77,6 +78,7 @@
 {% block footer %}
     <div id="footer">
         © <script>document.write(new Date().getFullYear())</script> Cloudinary. All rights reserved.<br>
-        Generated by <a href="http://sami.sensiolabs.org/">Sami, the API Documentation Generator</a>.
+        Generated by <a href="http://sami.sensiolabs.org/">Sami, the API Documentation Generator</a>.<br>
+        {{ project.config('title') }} version {{ project.versions[0] }}
     </div>
 {% endblock %}