Magento 2 composer install

The composer.json from magenticians is not up to date anymore. The following composer.json does work as of today, tested with Ubuntu 14.04

{   "minimum-stability": "dev",
    "require": {
        "magento/project-community-edition": "*@dev"
    },
    "repositories": [
        {
            "type": "vcs",
            "url": "https://github.com/magento/magento2.git"
        }
    ]
}

You will need a GitHub account (because of rate limiting issues) and the git command line utility installed.