added synopsis

README.md

@@ -4,6 +4,34 @@
 
 [![NPM version](https://badge.fury.io/js/dflow.png)](http://badge.fury.io/js/dflow) [![Build Status](https://travis-ci.org/fibo/dflow.png?branch=master)](https://travis-ci.org/fibo/dflow.png?branch=master) [![Dependency Status](https://gemnasium.com/fibo/dflow.png)](https://gemnasium.com/fibo/dflow)
 
+## Synopsis
+
+```js
+var dflow = require('dflow');
+
+// A JSON that represents the execution graph.
+var graph = {
+  "task": {
+    "1": { "func": "arguments[0]" },
+    "2": { "func": "console.log" }
+  },
+  "pipe": {
+    "3": { "from": "1", "to": "2", "arg": 0 }
+  }
+};
+
+// A collection of functions.
+var funcs = {
+  'console.log': console.log.bind(console),
+  '+': function plus (a, b) { return a + b }
+};
+
+// Create a function
+var f = dflow.func(funcs, graph);
+
+f('Hello World'); // prints "Hello World"
+```
+
 For more information point your browser to [dflow Homepage](http://www.g14n.info/dflow).
 
 ## Installation
@@ -14,7 +42,7 @@ With [npm](https://npmjs.org/) do
 $ npm install dflow
 ```
 
-# License
+## License
 
 [MIT](http://www.g14n.info/mit-license)