add possibility to start Plugins asynchron

If you are using many Plugins or Plugins with a long execution time you could execute them in an asynchronous manner.
It must be pointed out that enabling (0|1) this consume time, so don't use it for one rapid Plugin.

includes/MyTimedRotatingFileHandler.py

@@ -16,3 +16,8 @@ class MyTimedRotatingFileHandler(logging.handlers.TimedRotatingFileHandler):
 	def setBackupCount(self, backupCount):
 		"""Set/Change backupCount"""
 		self.backupCount = backupCount
+		
+	def close(self):
+		"""Make shure logfile will be flushed"""
+		self.flush()
+		super(self.__class__, self).close()