readme.md: added badges

Author: dg

readme.md

@@ -3,6 +3,8 @@ Nette Database
 
 [![Downloads this Month](https://img.shields.io/packagist/dm/nette/database.svg)](https://packagist.org/packages/nette/database)
 [![Build Status](https://travis-ci.org/nette/database.svg?branch=master)](https://travis-ci.org/nette/database)
+[![Latest Stable Version](https://poser.pugx.org/nette/database/v/stable)](https://github.com/nette/database/releases)
+[![License](https://img.shields.io/badge/license-New%20BSD-blue.svg)](https://github.com/nette/database/blob/master/license.md)
 
 Nette provides a powerful layer for accessing your database easily.