Moved more files around, working on VN engine

src/dawn/state/StateEvent.hpp

@@ -39,8 +39,9 @@ namespace Dawn {
        * @param args Arguments for this event to pass to the listeners.
        */
       void invoke(A... args) {
-        auto it = this->_eventListeners.begin();
-        while(it != this->_eventListeners.end()) {
+        auto copy = this->_eventListeners;
+        auto it = copy.begin();
+        while(it != copy.end()) {
           it->listener(args...);
           ++it;
         }