Tweak README.

Author: Crell

README.md

@@ -1,8 +1,7 @@
 PSR Event Dispatcher
 ====================
 
-This repository holds all interfaces/classes/traits related to
-[PSR-14](http://www.php-fig.org/psr/psr-14/).
+This repository holds the base interfaces related to [PSR-14](http://www.php-fig.org/psr/psr-14/).
 
 Note that this is not an Event Dispatcher implementation of its own. It is merely interfaces that describe the components of an Event Dispatcher.  See the specification for more details.