Add programmable Google Search to pytorch tutorials site (#2820)

* Add programmable Google Search to pytorch tutorials site

Author: svekars

_static/css/custom.css

@@ -91,3 +91,12 @@
     transition: none;
     transform-origin: none;
 }
+
+.pytorch-left-menu-search input[type=text] {
+    background-image: none;
+}
+
+.gsc-control-cse {
+   padding-left: 0px !important;
+   padding-bottom: 0px !important;
+}

_templates/layout.html

@@ -11,6 +11,23 @@
 </script>
 {%- endblock %}
 
+{% block sidebartitle %}
+    {% if theme_display_version %}
+      {%- set nav_version = version %}
+      {% if READTHEDOCS and current_version %}
+        {%- set nav_version = current_version %}
+      {% endif %}
+      {% if nav_version %}
+        <div class="version">
+            {{ nav_version }}
+        </div>
+      {% endif %}
+    {% endif %}
+    <div class="searchbox">
+        <script async src="https://cse.google.com/cse.js?cx=e65585f8c3ea1440e"></script>
+        <div class="gcse-search"></div>
+    </div>
+{% endblock %}
 
 {% block footer %}
 {{ super() }}