Document stand-alone usage

README.md

@@ -280,6 +280,44 @@ That's all the configuration required!  If you want to customize the adapter, su
 
 Note that instead of using the Ember Data error checking code in your application, you should use the ones provided by Ember AJAX.
 
+## Stand-Alone Usage
+
+If you aren't using Ember Data and do not have access to services, you
+can import the ajax utility like so:
+
+```js
+import request from 'ember-ajax/request';
+
+export default function someUtility(url) {
+  var options = {
+    // request options
+  };
+
+  return request(url, options).then(response => {
+    // `response` is the data from the server
+    return response;
+  });
+}
+```
+
+Which will have the same API as the `ajax` service. If you want the raw jQuery XHR object
+then you can use the `raw` method instead:
+
+```js
+import raw from 'ember-ajax/raw';
+
+export default function someOtherUtility(url) {
+  var options = {
+    // raw options
+  };
+
+  return raw(url, options).then(result => {
+    // `result` is an object containing `response` and `jqXHR`, among other items
+    return result;
+  });
+}
+```
+
 ## Testing
 
 ### Fixture Data