Add MCP9600 I2C Thermocouple Amplifier - K, J, T, N, S, E, B and R Type T

[mgrouch]

Add
Adafruit MCP9600 I2C Thermocouple Amplifier - K, J, T, N, S, E, B and R Type T

https://www.adafruit.com/product/4101

https://github.com/adafruit/Adafruit_MCP9600