README.md: add badge with dependencies' versions from VersionEye.

Fix #191

Documentation change.

[ci skip]

Author: php-coder

README.md

@@ -1,6 +1,7 @@
 # My Stamps
 
 [![Build Status](https://api.travis-ci.org/php-coder/mystamps.png?branch=master)](https://travis-ci.org/php-coder/mystamps)
+[![Dependency Status](https://www.versioneye.com/user/projects/55b783256537620017001225/badge.svg?style=flat)](https://www.versioneye.com/user/projects/55b783256537620017001225)
 [![Coverage Status](https://coveralls.io/repos/php-coder/mystamps/badge.png)](https://coveralls.io/r/php-coder/mystamps)
 [![Stories in Ready](https://badge.waffle.io/php-coder/mystamps.png?label=ready)](https://waffle.io/php-coder/mystamps)