Add badge to show number of project installations and downloads

README.md

@@ -1,4 +1,6 @@
 # clue/graph-composer [![Build Status](https://travis-ci.org/clue/graph-composer.png?branch=master)](https://travis-ci.org/clue/graph-composer)
+[![downloads on GitHub](https://img.shields.io/github/downloads/clue/graph-composer/total?color=blue&label=downloads%20on%20GitHub)](https://github.com/clue/graph-composer/releases)
+[![installs on Packagist](https://img.shields.io/packagist/dt/clue/graph-composer?color=blue&label=installs%20on%20Packagist)](https://packagist.org/packages/clue/graph-composer)
 
 Graph visualization for your project's `composer.json` and its dependencies: