feat: example now uses the instant_search index

Which has the right facets and a good starting point to build the demo

Author: vvo

example/app.js

@@ -5,7 +5,7 @@ var instantsearch = require('../');
 var search = new instantsearch.InstantSearch(
   'latency',
   '6be0576ff61c053d5f9a3225e2a90f76',
-  'bestbuy'
+  'instant_search'
 );
 
 search.addWidget(

example/templates/hit.html

@@ -4,9 +4,9 @@
       <img class="media-object" src="{{image}}">
     </a>
     <div class="media-body">
-      <h3 class="pull-right text-right text-info">${{salePrice}}</h3>
+      <h3 class="pull-right text-right text-info">${{price}}</h3>
       <h4>{{{_highlightResult.name.value}}}</h4>
-      <p>{{{_highlightResult.shortDescription.value}}}</p>
+      <p>{{{_highlightResult.description.value}}}</p>
     </div>
   </div>
 </div>