Add Benford's Law with Fibonacci sequence

The output:


    Benford's Law - Digit Distribution
    
    First 1000 Numbers in the Fibonacci Sequence
    
    digit    expect     found     delta
    1        30.1%      30.1%     0.00%
    2        17.6%      17.7%    -0.09%
    3        12.5%      12.5%    -0.01%
    4         9.7%       9.6%     0.09%
    5         7.9%       8.0%    -0.08%
    6         6.7%       6.7%    -0.01%
    7         5.8%       5.6%     0.20%
    8         5.1%       5.3%    -0.18%
    9         4.6%       4.5%     0.08%

Although this function works and we don't really care for performance, it would be much more efficient to use division and modulo instead of generating a `String` and parsing it back.