STEP 4: FizzBuzz added

FINAL STEP
Added FizzBuzz method.
Prints FizzBuzz if both isFizzed and isBuzzed Returns true.
Prints Fizz if isFizzed is true and isBuzzed is false
Prints Buzz if isFizzed is false and isBuzzed is true
else prints number.

Signed-off-by: Taylor Mott <trm36@humboldt.edu>