WeeWX UDP driver for WeatherFlow station

WeatherDisplay is configured with both the station ID that can be used to access the data via the WeatherFlow servers and the sensor names that will work with the UDP interface. For UDP to work, the computer running the WD software needs to be on the same subnet as the WeatherFlow huib ( UDP broadcasts across subnetsReading Weather Station data from a different subnet than the Hub is connected to ). Otherwise, it will need to get data from the WeatherFlow servers (which it can do if the station ID is configured correctly).