Events: enable class names and return jobdata

If the handler is an ES6 Class, return `handler.constructor.name` instead of `handler.type` in events.
In the `job.handled` event, return the jobdata as the second parameter.

lib/worker.js

@@ -215,14 +215,21 @@ FiveBeansWorker.prototype.doWork = function doWork(handler, jobID, jobdata)
 	var start = new Date().getTime();
 	this.currentJob = jobID;
 	this.currentHandler = handler;
+	var handlerName = (function(handler) {
+		if (handler.constructor && handler.constructor.name) {
+			return handler.constructor.name;
+		}
+
+		return handler.type;
+	})(handler);
 
 	try
 	{
 		handler.work(jobdata, function(action, delay)
 		{
 			var elapsed = new Date().getTime() - start;
 
-			self.emit('job.handled', { id: jobID, type: handler.type, elapsed: elapsed, action: action });
+			self.emit('job.handled', { id: jobID, type: handlerName, elapsed: elapsed, action: action }, jobdata);
 
 			switch (action)
 			{
@@ -246,7 +253,7 @@ FiveBeansWorker.prototype.doWork = function doWork(handler, jobID, jobdata)
 	}
 	catch (e)
 	{
-		self.emitWarning({ message: 'exception in job handler', id: jobID, handler: handler.type, error: e });
+		self.emitWarning({ message: 'exception in job handler', id: jobID, handler: handlerName, error: e });
 		self.buryAndMoveOn(jobID);
 	}
 };