Driver for MAX31865 RTD decoder

I've uploaded a driver for the MAX31865 decoder for RTD temperature probes to Github: GitHub - olewolf/arduino-max31865: Driver library for the MAX31865 RTD chip. It works with Playing with Fusion's break-out board. It differs from the driver from Playing with Fusion by applying the Callendar-Van Dusen equation for better accuracy, and is more object-oriented (doing away with pointers and such). GPLv3 license.