For existing Symfony2 applications, references to Symfony\Framework are found
in the main Kernel class (registerBundles() and registerBundleDirs()), and in
all Controller classes. You also need to change the console script.
The HttpFoundation component holds classes that wrap PHP native global arrays.
The following classes has been moved:
* Symfony\Components\HttpKernel\Response -> Symfony\Components\HttpFoundation\Response
* Symfony\Components\HttpKernel\Request -> Symfony\Components\HttpFoundation\Request
* Symfony\Framework\FoundationBundle\User -> Symfony\Components\HttpFoundation\Session
* Symfony\Framework\FoundationBundle\Session\* -> Symfony\Components\HttpFoundation\SessionStorage\*Storage
The web:user DI configuration has been moved to kernel:session.
The user helper has been renamed to session.
