composer.json VS deps

composer.json

{
    "require": {
        "php":              ">=5.3.2",
        "symfony/symfony":  ">=2.0.7,<2.1.0-dev",
        "doctrine/orm":     "2.1.*",
        "twig/extensions":  "*",

        "symfony/assetic-bundle":         "*",
        "sensio/generator-bundle":        "2.0.*",
        "sensio/framework-extra-bundle":  "2.0.*",
        "sensio/distribution-bundle":     "2.0.*",
        "jms/security-extra-bundle":      "1.0.*"
    },

    "autoload": {
        "psr-0": {
            "Acme": "src/"
        }
    }
}

deps_file

###########################
###
### deps
###
###########################

[symfony]
    git=http://github.com/symfony/symfony.git

[twig]
    git=http://github.com/fabpot/Twig.git
    version=origin/master

[monolog]
    git=http://github.com/Seldaek/monolog.git
    version=1.0.2

[doctrine-common]
    git=http://github.com/doctrine/common.git
    version=origin/master

[doctrine-dbal]
    git=http://github.com/doctrine/dbal.git
    version=origin/master

[doctrine]
    git=http://github.com/doctrine/doctrine2.git
    version=origin/master

[swiftmailer]
    git=http://github.com/swiftmailer/swiftmailer.git
    version=v4.1.5

[assetic]
    git=http://github.com/kriswallsmith/assetic.git
    version=v1.0.2

[twig-extensions]
    git=http://github.com/fabpot/Twig-extensions.git

[metadata]
    git=http://github.com/schmittjoh/metadata.git
    version=1.1.0

[SensioFrameworkExtraBundle]
    git=http://github.com/sensio/SensioFrameworkExtraBundle.git
    target=/bundles/Sensio/Bundle/FrameworkExtraBundle
    version=origin/master

[JMSSecurityExtraBundle]
    git=http://github.com/schmittjoh/JMSSecurityExtraBundle.git
    target=/bundles/JMS/SecurityExtraBundle
    version=origin/1.0.x

[SensioDistributionBundle]
    git=http://github.com/sensio/SensioDistributionBundle.git
    target=/bundles/Sensio/Bundle/DistributionBundle
    version=origin/master

[SensioGeneratorBundle]
    git=http://github.com/sensio/SensioGeneratorBundle.git
    target=/bundles/Sensio/Bundle/GeneratorBundle
    version=origin/master

[AsseticBundle]
    git=http://github.com/symfony/AsseticBundle.git
    target=/bundles/Symfony/Bundle/AsseticBundle
    version=v1.0.1

[DoctrineBundle]
    git=http://github.com/doctrine/DoctrineBundle.git
    target=/bundles/Doctrine/Bundle/DoctrineBundle
    version=origin/master

###########################
###
### app/autoload.php
###
###########################

$loader = new UniversalClassLoader();
$loader->registerNamespaces(array(
    'Symfony'          => array(__DIR__.'/../vendor/symfony/src', __DIR__.'/../vendor/bundles'),
    'Sensio'           => __DIR__.'/../vendor/bundles',
    'JMS'              => __DIR__.'/../vendor/bundles',
    'Doctrine\\Bundle' => __DIR__.'/../vendor/bundles',
    'Doctrine\\Common' => __DIR__.'/../vendor/doctrine-common/lib',
    'Doctrine\\DBAL'   => __DIR__.'/../vendor/doctrine-dbal/lib',
    'Doctrine'         => __DIR__.'/../vendor/doctrine/lib',
    'Monolog'          => __DIR__.'/../vendor/monolog/src',
    'Assetic'          => __DIR__.'/../vendor/assetic/src',
    'Metadata'         => __DIR__.'/../vendor/metadata/src',
));