EventDispatcherInterface - Fix for Symfony 2.4

EventDispatcher > EventDispatcherInterface

Background:

php app/console clank:server

Catchable Fatal Error: Argument 3 passed to JDare\ClankBundle\Server\App\ClankApp::__construct() must be an instance of Symfony\Component\EventDispatcher\EventDispatcher, instance of Symfony\Component\HttpKernel\Debug\TraceableEventDispatcher given