Packagist

Package Repository Website for Composer

Installation

Clone the repository
Run bin/vendors install to get all the vendors.
Copy app/config/parameters.ini.dist to app/config/parameters.ini and edit the relevant values for your setup.
Run app/console doctrine:schema:create to setup the DB.
Make a VirtualHost with DocumentRoot pointing to web/
You should now be able to access the site, create a user, etc.