Add usage section to readme

README.md

@@ -12,6 +12,43 @@ Client library for the Tor Onionoo API with backend agnostic caching.
 npm install --save onionoo
 ```
 
+## Usage
+
+```js
+const Onionoo = require('onionoo');
+const onionoo = new Onionoo();
+
+// Get top 10 relays
+const query = {
+  limit: 10,
+  running: true,
+  order: '-consensus_weight'
+};
+
+onionoo.summary(query).then(response => {
+    console.log(response.body)
+    // {
+    //   version:'3.1',
+    //   relays_published:'2016-12-23 09:00:00',
+    //   relays:[
+    //     [Object],
+    //     [Object],
+    //     [Object],
+    //     [Object],
+    //     [Object],
+    //     [Object],
+    //     [Object],
+    //     [Object],
+    //     [Object],
+    //     [Object]
+    //   ],
+    //   bridges_published:'2016-12-23 07:41:03',
+    //   bridges:[]
+    // }
+    }
+});
+```
+
 ## License
 
 MIT © Luke Childs