curl -s http://getcomposer.org/installer | php
Light version
composer.phar create-project rithis/symfony-skeleton <target-directory> dev-master
With Doctrine ORM
composer.phar create-project rithis/symfony-skeleton <target-directory> dev-orm
With Doctrine ORM and Sonata Admin
composer.phar create-project rithis/symfony-skeleton <target-directory> dev-admin