Update readme

.travis.yml

@@ -1,4 +1,3 @@
 language: node_js
 node_js:
-  - "0.8"
   - "0.10"

README.md

@@ -10,6 +10,25 @@ A simple object to represent an http response
 
     npm install http-response-object
 
+## Usage
+
+```js
+var Response = require('http-response-object');
+var res = new Response(200, {}, new Buffer('A ok'));
+//res.statusCode === 200
+//res.headers === {}
+//res.body === new Buffer('A ok')
+res.getBody();
+// => new Buffer('A ok')
+
+var res = new Response(404, {'Header': 'value'}, new Buffer('Wheres this page'));
+//res.statusCode === 404
+//res.headers === {header: 'value'}
+//res.body === new Buffer('Wheres this page')
+res.getBody();
+// => throws error with `statusCode`, `headers` and `body` properties.
+```
+
 ## License
 
   MIT