Add programmable Google Search to pytorch tutorials site

Author: svekars

_templates/layout.html

@@ -11,6 +11,32 @@
 </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>
+<!-- JavaScript to remove search-icon background image -->
+<script>
+  window.addEventListener('load', function() {
+      var input = document.querySelector('.gsc-input input[type=text]');
+      if (input) {
+          input.style.backgroundImage = 'none';
+      }
+  });
+</script>
+{% endblock %}
 
 {% block footer %}
 {{ super() }}