Add Packagist downloads badge

Author: BrainMaestro

README.md

@@ -1,6 +1,7 @@
 # composer-git-hooks
 [![Travis](https://img.shields.io/travis/BrainMaestro/composer-git-hooks.svg?style=flat-square)](https://travis-ci.org/BrainMaestro/composer-git-hooks)
 [![Packagist](https://img.shields.io/packagist/v/brainmaestro/composer-git-hooks.svg?style=flat-square)](https://packagist.org/packages/brainmaestro/composer-git-hooks)
+[![Packagist](https://img.shields.io/packagist/dt/brainmaestro/composer-git-hooks.svg?style=flat-square)](https://packagist.org/packages/brainmaestro/composer-git-hooks)
 > Manage git hooks easily in your composer configuration. This package makes it easy to implement a consistent project-wide usage of git hooks. Specifying hooks in the composer file makes them available for every member of the project team. This provides a consistent environment and behavior for everyone which is great.
 
 ## Install