report uncovered dependencies

[smoench]

resolves #231

Symfony\Bundle\DebugBundle\Command\ServerDumpPlaceholderCommand has uncovered dependency on Closure (DebugBundle)
/Users/simon/Projects/symfony/src/Symfony/Component/Console/Command/Command.php::281
	Symfony\Component\Console\Command\Command::28 ->
	Closure::281
Symfony\Bundle\DebugBundle\Command\ServerDumpPlaceholderCommand has uncovered dependency on ReflectionFunction (DebugBundle)
/Users/simon/Projects/symfony/src/Symfony/Component/Console/Command/Command.php::282
	Symfony\Component\Console\Command\Command::28 ->
	ReflectionFunction::282
Symfony\Bundle\DebugBundle\Command\ServerDumpPlaceholderCommand has uncovered dependency on Closure (DebugBundle)
/Users/simon/Projects/symfony/src/Symfony/Component/Console/Command/Command.php::284
	Symfony\Component\Console\Command\Command::28 ->
	Closure::284
Symfony\Bundle\DebugBundle\DependencyInjection\DebugExtension has uncovered dependency on InvalidArgumentException (DebugBundle)
/Users/simon/Projects/symfony/src/Symfony/Bridge/ProxyManager/vendor/symfony/dependency-injection/Extension/ExtensionInterface.php::23
	Symfony\Component\DependencyInjection\Extension\Extension::29 ->
	Symfony\Component\DependencyInjection\Extension\ExtensionInterface::27 ->
	InvalidArgumentException::23
Symfony\Bundle\DebugBundle\DependencyInjection\DebugExtension has uncovered dependency on InvalidArgumentException (DebugBundle)
/Users/simon/Projects/symfony/src/Symfony/Component/ErrorCatcher/vendor/symfony/dependency-injection/Extension/ExtensionInterface.php::23
	Symfony\Component\DependencyInjection\Extension\Extension::29 ->
	Symfony\Component\DependencyInjection\Extension\ExtensionInterface::27 ->
	InvalidArgumentException::23
Symfony\Bundle\DebugBundle\DependencyInjection\DebugExtension has uncovered dependency on InvalidArgumentException (DebugBundle)
/Users/simon/Projects/symfony/src/Symfony/Component/DependencyInjection/Extension/ExtensionInterface.php::23
	Symfony\Component\DependencyInjection\Extension\Extension::29 ->
	Symfony\Component\DependencyInjection\Extension\ExtensionInterface::27 ->
	InvalidArgumentException::23

Report:
Violations: 11093
Skipped violations: 0
Uncovered: 17655
Allowed: 4630

@jakzal Here you go :-) But I need to rework the type resolving a bit and probably ignore internal php classes