adding swiftype search script to footer.html

docsite/_themes/srtd/footer.html

@@ -12,6 +12,15 @@
 
   <hr/>
 
+<script type="text/javascript">
+  (function(w,d,t,u,n,s,e){w['SwiftypeObject']=n;w[n]=w[n]||function(){
+  (w[n].q=w[n].q||[]).push(arguments);};s=d.createElement(t);
+  e=d.getElementsByTagName(t)[0];s.async=1;s.src=u;e.parentNode.insertBefore(s,e);
+  })(window,document,'script','//s.swiftypecdn.com/install/v2/st.js','_st');
+
+  _st('install','yABGvz2N8PwcwBxyfzUc','2.0.0');
+</script>
+
   <p>
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