README.md in exporter-0.0.3 vs README.md in exporter-0.1.0

@@ -2,26 +2,31 @@
 [![Gem Version](https://badge.fury.io/rb/exporter.png)](http://badge.fury.io/rb/exporter)
 [![Build Status](https://travis-ci.org/voanhduy1512/exporter.png?branch=master)](https://travis-ci.org/voanhduy1512/exporter)
 [![Code Climate](https://codeclimate.com/github/voanhduy1512/exporter.png)](https://codeclimate.com/github/voanhduy1512/exporter)
 [![Coverage Status](https://coveralls.io/repos/voanhduy1512/exporter/badge.png)](https://coveralls.io/r/voanhduy1512/exporter)
 [![Dependency Status](https://gemnasium.com/voanhduy1512/exporter.png)](https://gemnasium.com/voanhduy1512/exporter)
+[![Bitdeli Badge](https://d2weczhvl823v0.cloudfront.net/voanhduy1512/exporter/trend.png)](https://bitdeli.com/free "Bitdeli Badge")
 
-
-
-
 ## Installation
 
 Add this line to your application's Gemfile:
 
     gem 'exporter'
 
 And then execute:
 
     $ bundle
 
-Or install it yourself as:
+## Usage
+``` ruby
+# Here is the data which you want to export
+users = User.all
 
-    $ gem install exporter
+# export it
+Exporter.export(users, :csv).to_file(path_to_file)
+```
 
-## Usage
+Only support export to csv now (more types are coming)
 
-TODO: Write usage instructions here
+
+
+