Editar un proyecto existente de Symfony2

[Drummer]

Aquí te lo dejo:

Código:

{
    "autoload": {
        "psr-0": { "": "src/" }
    },
    "repositories": {
        "phing": {
            "type": "pear",
            "url": "http://pear.phing.info"
        },
        "phingGit": {
            "type": "package",
            "package": {
	        	"name": "phing",
	        	"version": "master",
	        	"source": {
	                "url": "git://github.com/Xosofox/phing.git",
	                "type": "git",
	                "reference": "master"
	            }
            }
        },
        "TypehintableBehavior": {
            "type": "package",
            "package": {
	        	"name": "TypehintableBehavior",
	        	"version": "master",
	        	"source": {
	                "url": "git://github.com/willdurand/TypehintableBehavior.git",
	                "type": "git",
	                "reference": "master"
	            }
            }
        }
    },
    "require": {
        "php": ">=5.3.2",
        "symfony/symfony": "2.1.*",
        "doctrine/orm": "2.2.0",
        "doctrine/doctrine-bundle": "dev-master",
        "doctrine/mongodb-odm-bundle": "dev-master",
        "twig/extensions": "dev-master",
        "symfony/assetic-bundle": "dev-master",
        "symfony/swiftmailer-bundle": "dev-master",
        "symfony/monolog-bundle": "dev-master",
        "sensio/distribution-bundle": "dev-master",
        "sensio/framework-extra-bundle": "dev-master",
        "sensio/generator-bundle": "dev-master",
        "jms/security-extra-bundle": "dev-master",
        "friendsofsymfony/user-bundle": "dev-master",
        "propel/propel-bundle": "1.1.5",
        "propel/propel1": "dev-master",
        "phing": "master",
        "TypehintableBehavior": "master",
        "white-october/pagerfanta-bundle": "dev-master",
        "doctrine/doctrine-fixtures-bundle": "dev-master",
	"knplabs/knp-menu-bundle": "dev-master",
	"cedriclombardot/admingenerator-generator-bundle": "dev-master",
	"cedriclombardot/admingenerator-activeadmintheme-bundle": "dev-master",
	"cedriclombardot/admingenerator-user-bundle": "dev-master"
    },
    "minimum-stability": "dev",
    "scripts": {
        "post-install-cmd": [
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets"
        ],
        "post-update-cmd": [
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets"
        ]
    },
    "config": {
        "bin-dir": "bin"
    },
    "extra": {
        "symfony-app-dir": "app",
        "symfony-web-dir": "web"
    }
}

Y como t pusiste tu al día con todo esto?