Set up factorial generator class and spec.
First attempt at iterative method, but doesn't work for 0
Ugly solution, but works for 0! too.
Refactored to be a much simpler method.
Added recursive version.
Added benchmarking to compare the speed of the two methods.
Set up FizzBuzz files.
Fizz and Buzz part of the method.
Working for FizzBuzz too now.
Now returns the number if it doesn't meet any of the requirements.
Added some more tests with additional numbers just to double check.