add logging to event bus

core/src/main/groovy/com/muwire/core/EventBus.groovy

@@ -4,11 +4,14 @@ import java.util.concurrent.CopyOnWriteArrayList
 
 import com.muwire.core.files.FileSharedEvent
 
+import groovy.util.logging.Log
+@Log
 class EventBus {
 	
 	private Map handlers = new HashMap()
 
 	void publish(Event e) {
+		log.fine "publishing event of type ${e.getClass().getSimpleName()}"
 		def currentHandlers
 		final def clazz = e.getClass()
 		synchronized(handlers) {
@@ -20,6 +23,7 @@ class EventBus {
 	}
 	
 	synchronized void register(Class<? extends Event> eventType, def handler) {
+		log.info "Registering $handler for type $eventType"
 		def currentHandlers = handlers.get(eventType)
 		if (currentHandlers == null) {
 			currentHandlers = new CopyOnWriteArrayList()