Removed getName() from PackageInterface. This interface is now a type only.
Added the 'use' keyword to standardize
Refactoring 'Plus\Packager' tests
Added symfony/yaml as dependency
Added Plus\Configurator in composer autoloader
Added Plus\Event in composer autoloader
Added Plus\ExceptionManager in composer autoloader
Added Plus\Http in composer autoloader
Added Plus\Kernel in composer autoloader
Added Plus\Router in composer autoloader