[TYPO3-install] Install TYPO3 CMS 7.x with Composer

[Thomas W.]

Hi Everybody,

I'm trying to install TYPO3 CMS 7 via composer.  
This is the reduced Version of my composer.json:
{
    "name": "name",
    "description": "Project",
    "license": "GPL-3.0+",
    "repositories": [
        {
            "type": "composer",
            "url": "" (<-- asume URL to 'composer _ typo3 _ org/ ' here (I'm not allowed to post Links yet))
        }
    ],


    "require": {
        "typo3/cms": "~7.2"
    }
}


This composer.json works fine with "typo3/cms": "~6.2" but not with "typo3/cms": "~7.2". When I call the Backend I get this Error:

Fatal error: Uncaught exception 'LogicException' with message 'No class loading information found for TYPO3 CMS. Please make sure you installed TYPO3 with composer or the typo3/contrib/vendor folder is present.' in /var/www/html/TYPO3-7-composer-test/typo3_src/typo3/sysext/core/Classes/Core/Bootstrap.php:229 Stack trace: #0 /var/www/html/TYPO3-7-composer-test/typo3_src/typo3/sysext/core/Classes/Core/Bootstrap.php(117): TYPO3\CMS\Core\Core\Bootstrap::initializeComposerClassLoader() #1 /var/www/html/TYPO3-7-composer-test/typo3_src/typo3/init.php(46): TYPO3\CMS\Core\Core\Bootstrap::getInstance() #2 /var/www/html/TYPO3-7-composer-test/typo3_src/typo3/index.php(21): require('/var/www/html/T...') #3 {main} thrown in /var/www/html/TYPO3-7-composer-test/typo3_src/typo3/sysext/core/Classes/Core/Bootstrap.php on line 229

Any Suggestions? 

Does anybody have a working version of a composer.json for TYPO 3 7.x 

Thanks in Andvance!!

Thomas