[roddyp]

Ok I added the (18) address to the onewire command and now it compiles ok

Ah. I've looked at it closer, and this isn't going to do at all what you expect.

The two libraries are very different, so I think you'll need to uninstall the 'official' OneWire lib and just use the Weatherduino-specific one. And revert the change with '18'!

You'll need to remove the folder ' /Users/Mark/Documents/Arduino/libraries/OneWire' - But this will mean that any sketches that need the regular one-wire library won't work. 

I'm not sure of the implications of the other clashes. 

Multiple libraries were found for "OneWire.h"
Used: /Users/Mark/Documents/Arduino/libraries/OneWire
Not used: /Users/Mark/Documents/Arduino/libraries/DS2482OneWire
Multiple libraries were found for "DallasTemperature.h"
Used: /Users/Mark/Documents/Arduino/libraries/DallasTemperature
Not used: /Users/Mark/Documents/Arduino/libraries/Arduino-Temperature-Control-Library-master
Multiple libraries were found for "EEPROM.h"
Used: /Applications/Arduino 2.app/Contents/Java/hardware/arduino/avr/libraries/EEPROM
Not used: /Users/Mark/Documents/Arduino/libraries/EEPROM