Neos Collection Install

composer.json

{
    "name": "typo3/neos-base-distribution",
    "description" : "TYPO3 Neos Base Distribution",
    "license": "GPL-3.0+",
    "support": {
        "email": "neos@typo3.org",
        "irc": "irc://irc.freenode.org/typo3-neos",
        "forum": "http://forum.typo3.org/index.php/f/121/",
        "issues": "https://jira.typo3.org/",
        "source": "https://git.typo3.org/"
    },
    "config": {
        "vendor-dir": "Packages/Libraries",
        "bin-dir": "bin"
    },
    "require": {
        "neos/neos-development-collection": "dev-master",
        "neos/flow-development-collection": "dev-master",
      
        "typo3/neosdemotypo3org": "dev-master",
        "typo3/neos-kickstarter": "dev-master",

        "doctrine/migrations": "@dev",

        "typo3/party": "@dev",
        "typo3/neos-seo": "@dev",
        "typo3/imagine": "@dev",
        "typo3/twitter-bootstrap": "@dev",
        "typo3/form": "@dev",
        "typo3/setup": "@dev"

    },
    "require-dev": {
        "typo3/buildessentials": "dev-master",
        "mikey179/vfsstream": "1.5.*",
        "phpunit/phpunit": "4.6.*",
        "flowpack/behat": "dev-master"
    },
    "suggest": {
        "ext-pdo_sqlite": "For running functional tests out-of-the-box this is required"
    },
    "minimum-stability": "dev",
    "scripts": {
        "post-update-cmd": "TYPO3\\Flow\\Composer\\InstallerScripts::postUpdateAndInstall",
        "post-install-cmd": "TYPO3\\Flow\\Composer\\InstallerScripts::postUpdateAndInstall",
        "post-package-update":"TYPO3\\Flow\\Composer\\InstallerScripts::postPackageUpdateAndInstall",
        "post-package-install":"TYPO3\\Flow\\Composer\\InstallerScripts::postPackageUpdateAndInstall"
    }
}

I'd suggest to remove "minimum-stability": "dev", we just need to add "flowpack/neos-frontendlogin": "@dev" to make Composer happy