Update sphinx_rtd_theme

doc/_themes/sphinx_rtd_theme/footer.html

@@ -28,5 +28,6 @@
     </p>
   </div>
 
-  {% trans %}<a href="https://github.com/snide/sphinx_rtd_theme">Sphinx theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>{% endtrans %}
+  {% trans %}Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/snide/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>{% endtrans %}.
+  
 </footer>

doc/_themes/sphinx_rtd_theme/layout.html

@@ -23,7 +23,7 @@
   {% endif %}
 
   {# CSS #}
-  <link href='https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic|Roboto+Slab:400,700|Inconsolata:400,700' rel='stylesheet' type='text/css'>
+  <link href='https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic|Roboto+Slab:400,700|Inconsolata:400,700&subset=latin,cyrillic' rel='stylesheet' type='text/css'>
 
   {# OPENSEARCH #}
   {% if not embedded %}
@@ -89,6 +89,7 @@
       </div>
 
       <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation">
+        {% block menu %}
           {% set toctree = toctree(maxdepth=2, collapse=False, includehidden=True) %}
           {% if toctree %}
               {{ toctree }}
@@ -96,6 +97,7 @@
               <!-- Local TOC -->
               <div class="local-toc">{{ toc }}</div>
           {% endif %}
+        {% endblock %}
       </div>
       &nbsp;
     </nav>

doc/_themes/sphinx_rtd_theme/searchbox.html

@@ -1,3 +1,4 @@
+{%- if builder != 'singlehtml' %}
 <div role="search">
   <form id="rtd-search-form" class="wy-form" action="{{ pathto('search') }}" method="get">
     <input type="text" name="q" placeholder="Search docs" />
@@ -5,3 +6,4 @@
     <input type="hidden" name="area" value="default" />
   </form>
 </div>
+{%- endif %}