cleanup README for 2.0.0 release

Author: dbu

README.md

@@ -4,19 +4,18 @@
 [![Latest Stable Version](https://poser.pugx.org/symfony-cmf/routing/version.png)](https://packagist.org/packages/symfony-cmf/routing)
 [![Total Downloads](https://poser.pugx.org/symfony-cmf/routing/d/total.png)](https://packagist.org/packages/symfony-cmf/routing)
 
-The Symfony CMF Routing component extends the Symfony2 core routing component.
-It provides:
+The Symfony CMF Routing component extends the Symfony routing component with additional features:
 
  * A ChainRouter to run several routers in parallel
  * A DynamicRouter that can load routes from any database and can generate
    additional information in the route match.
 
-Even though it has Symfony in its name, the Routing component does not need the
-full Symfony2 Framework and can be used in standalone projects.
+The CMF Routing component does not need the Symfony full stack framework. It is
+also useful in applications not using the full Symfony framework.
 
-For Symfony 2 projects, an optional
-[RoutingBundle](https://github.com/symfony-cmf/RoutingBundle)
-is also available.
+For the best integration into the Symfony full stack framework, it is
+recommended to use the [RoutingBundle](https://github.com/symfony-cmf/RoutingBundle)
+when building Symfony full stack applications.
 
 This library is provided by the [Symfony Content Management Framework (CMF) project](http://cmf.symfony.com/)
 and licensed under the [MIT License](LICENSE).
@@ -25,7 +24,7 @@ and licensed under the [MIT License](LICENSE).
 ## Requirements
 
 * PHP 5.6 / 7
-* The Symfony Routing component (2.2.0 - 3.\*)
+* The Symfony Routing component (2.8 - 3.\*)
 * See also the `require` section of [composer.json](composer.json)