minor #890 Update phpDoc for ControllerCollection (Kilte)

This PR was squashed before being merged into the 1.2.x-dev branch (closes #890).

Discussion
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Update phpDoc for ControllerCollection

__call() forwards method-calls to Route, but returns instance of ControllerCollection.
 Added the listing Route's methods, so that IDEs know they are valid.

Commits
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53b3a357 Update phpDoc for ControllerCollection

src/Silex/ControllerCollection.php

@@ -21,6 +21,18 @@ use Symfony\Component\HttpFoundation\Request;
  * until flush() is called, at which point all controllers are frozen and
  * converted to a RouteCollection.
  *
+ * __call() forwards method-calls to Route, but returns instance of ControllerCollection
+ * listing Route's methods below, so that IDEs know they are valid
+ *
+ * @method \Silex\ControllerCollection assert(string $variable, string $regexp)
+ * @method \Silex\ControllerCollection value(string $variable, mixed $default)
+ * @method \Silex\ControllerCollection convert(string $variable, mixed $callback)
+ * @method \Silex\ControllerCollection method(string $method)
+ * @method \Silex\ControllerCollection requireHttp()
+ * @method \Silex\ControllerCollection requireHttps()
+ * @method \Silex\ControllerCollection before(mixed $callback)
+ * @method \Silex\ControllerCollection after(mixed $callback)
+ *
  * @author Igor Wiedler <igor@wiedler.ch>
  * @author Fabien Potencier <fabien@symfony.com>
  */