Sensors: TSL2591
- Stared with Adafruit's Adafruit_TSL2591_Library
https://github.com/adafruit/Adafruit_TSL2591_Library
- Replaced the Adrino's reads and writes with call to the wiringPi library
- Sanity checked the code against this JS program:
https://github.com/bbx10/tsl2591-node/blob/master/tsl2591.js