Update README.md

README.md

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 Piwik Development Environment
 =====================
 
+This configuration makes it very easy to start with Piwik development or to give Piwik a try in your local environment. It'll setup a virtual machine including everything you need to run Piwik. 
+
 ### Available Vagrant Boxes
  * Ubuntu Precise 32
  * Ubuntu Precise 64
+
+### Installation
+ 1. Install [Vagrant](http://www.vagrantup.com) & [VirtualBox](https://www.virtualbox.org)
+ 2. Clone this repository
+ 3. Execute the command `vagrant up` within a `vagrant/$box` folder
+ 4. That's it. It'll take some time when executing this command the first time. It'll download the Vagrant base box once and install all required packages.
+ 5. Don't forget to update your local hosts file. You have to add "apache.piwik" as well as "nginx.piwik".
+
+### Usage
+
+Open "http://apache.piwik" or "http://nginx.piwik:8080" after installation. You'll see the [Piwik installation](http://piwik.org/docs/installation/#toc-the-5-minute-piwik-installation) screen.
+
+### Installed Packages
+ * PHP
+ * PHP QA Tools (PHPUnit, PHPMD - PHP Mess Detector, PHP Depend, PHP CodeCoverage, PHP_CodeSniffer, ...)
+ * Apache2
+ * NGINX & PHP-FPM
+ * MySQL
+ * Percona-Toolkit
+ * Subversion
+ * Git
+ * Composer
+
+You'll find Piwik here: `/var/www/piwik` 
+
+Let us know if you miss something.