Green - ReturnFizzIfDivisibleByThree
Refactor - ReturnFizzIfInputIsDivisibleByThree

ReturnFizzIfInputIsDivisibleByThree now is called with a parameter
divisible by three
Red - ReturnFizzIfInputIsDivisibleByThree

woo, you get our first real refactor =D   Also, you would think github
for windows would respect the word refactor.