Routing Component
  =================
  
  Routing associates a request with the code that will convert it to a response.
  
  The example below demonstrates how you can set up a fully working routing
  system:
  
      use Symfony\Component\HttpFoundation\Request;
      use Symfony\Component\Routing\Matcher\UrlMatcher;
      use Symfony\Component\Routing\RequestContext;
      use Symfony\Component\Routing\RouteCollection;
      use Symfony\Component\Routing\Route;
  
      $routes = new RouteCollection();
      $routes->add('hello', new Route('/hello', array('controller' => 'foo')));
  
      $context = new RequestContext();
  
      // this is optional and can be done without a Request instance
      $context->fromRequest(Request::createFromGlobals());
  
      $matcher = new UrlMatcher($routes, $context);
  
      $parameters = $matcher->match('/hello');
  
  Resources
  ---------
  
  Unit tests:
  
  https://github.com/symfony/symfony/tree/master/tests/Symfony/Tests/Component/Routing