added vagrant link

README.md

@@ -15,9 +15,10 @@ You're going to love Zammad!
 - Code: [![Code Climate](https://codeclimate.com/github/zammad/zammad/badges/gpa.svg)](https://codeclimate.com/github/zammad/zammad) [![Coverage Status](https://coveralls.io/repos/github/zammad/zammad/badge.svg)](https://coveralls.io/github/zammad/zammad)
 - Docs: [![Documentation Status](https://readthedocs.org/projects/zammad/badge/?version=latest)](https://docs.zammad.org)
 - Issues: [![Percentage of issues still open](http://isitmaintained.com/badge/open/zammad/zammad.svg)](https://github.com/zammad/zammad/issues "Percentage of issues still open") [![Average time to resolve an issue](http://isitmaintained.com/badge/resolution/zammad/zammad.svg)](https://github.com/zammad/zammad/issues?q=is%3Aissue+is%3Aclosed "Average time to resolve an issue")
-- Current stable & develop DEB/RPM downloads: [![](https://img.shields.io/badge/Branch-develop-lightgrey.svg)](https://packager.io/gh/zammad/zammad#develop) [![](https://img.shields.io/badge/Branch-stable-lightgrey.svg)](https://packager.io/gh/zammad/zammad#stable)
-- Docker single container develop image: [![](https://images.microbadger.com/badges/image/zammad/zammad.svg)](https://microbadger.com/images/zammad/zammad) [![](https://images.microbadger.com/badges/version/zammad/zammad.svg)](https://hub.docker.com/r/zammad/zammad/)
-- Docker multi container stable image: [![](https://images.microbadger.com/badges/image/zammad/zammad-docker-compose:zammad.svg)](https://microbadger.com/images/zammad/zammad-docker-compose:zammad) [![](https://img.shields.io/badge/version-stable-blue.svg)](https://hub.docker.com/r/zammad/zammad-docker-compose)
+- Download DEB/RPM: [![](https://img.shields.io/badge/Branch-develop-lightgrey.svg)](https://packager.io/gh/zammad/zammad#develop) [![](https://img.shields.io/badge/Branch-stable-lightgrey.svg)](https://packager.io/gh/zammad/zammad#stable)
+- Docker multi container image: [![](https://images.microbadger.com/badges/image/zammad/zammad-docker-compose:zammad.svg)](https://microbadger.com/images/zammad/zammad-docker-compose:zammad) [![](https://img.shields.io/badge/version-stable-blue.svg)](https://hub.docker.com/r/zammad/zammad-docker-compose)
+- Docker single container image: [![](https://images.microbadger.com/badges/image/zammad/zammad.svg)](https://microbadger.com/images/zammad/zammad) [![](https://images.microbadger.com/badges/version/zammad/zammad.svg)](https://hub.docker.com/r/zammad/zammad/)
+- Vagrant: [![](https://img.shields.io/badge/version-develop-blue.svg)](https://github.com/zammad/zammad-vagrant)
 - License: [![](https://img.shields.io/badge/License-AGPL 3.0-lightgrey.svg)](https://github.com/zammad/zammad/blob/develop/LICENSE)
 
 ## Installing & Getting Started