[#168,docs/backend][m]: major extension to backend tutorial to give examples of most backends.

_includes/example-backends-elasticsearch.js

@@ -0,0 +1,13 @@
+var dataset = new recline.Model.Dataset({
+  url: 'http://datahub.io/dataset/rendition-on-record/ac5a28ea-eb52-4b0a-a399-5dcc1becf9d9/api',
+  backend: 'elasticsearch'
+});
+
+dataset.fetch();
+
+// For demonstrations purposes display the data in a grid
+var grid = new recline.View.SlickGrid({
+  model: dataset
+});
+$('#my-elasticsearch').append(grid.el);
+