update readme

README.md

@@ -1,10 +1,14 @@
 SwiftMailer Extension for Yii 2
 ===============================
 
-This extension provides a [SwiftMailer](http://swiftmailer.org/) mail solution for Yii 2.
+This extension provides a [SwiftMailer](http://swiftmailer.org/) mail solution for [Yii framework 2.0](http://www.yiiframework.com).
 
 For license information check the [LICENSE](LICENSE.md)-file.
 
+[![Latest Stable Version](https://poser.pugx.org/yiisoft/yii2-swiftmailer/v/stable.png)](https://packagist.org/packages/yiisoft/yii2-swiftmailer)
+[![Total Downloads](https://poser.pugx.org/yiisoft/yii2-swiftmailer/downloads.png)](https://packagist.org/packages/yiisoft/yii2-swiftmailer)
+[![Build Status](https://travis-ci.org/yiisoft/yii2-swiftmailer.svg?branch=master)](https://travis-ci.org/yiisoft/yii2-swiftmailer)
+
 Installation
 ------------