BoilerNodeTwin

I added a socket to the airwick enclosure and connected up another temperature gauge.  Was pleased

to find that roomnodetwin worked with all the airwick stuff.  

But then found the +50/-50 degree problem when I came to measure the pipe temperatures.

So attached is a relatively simple (wasn't for me!) update to BoilerNode.lua which gives the correct

temperatures.  Also attached my jeenodeapplet.lua for the three airwicks.

Feed is at https://cosm.com/feeds/13194

Regards

Kim