Add bar and whisker graph

[kenje4090]

Add bar and whisker graph

for range of fitness and average for that generation
It tells you median, and min/max

Make a thin, very narrow box and whisker
Can be a single line if color coding is used
Maybe 3 or 5 pixels wide per generation
Or do better styles

And use color to represent the density or percentage of the population in that range
or color to represent the cumulative probability of distance from mean
So mean is red
And then it goes more blue as go from the center
And the rate of color change is cumulative probability
And center is median value

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If you snap the color gradient to nearest value
And color gradient
You can have N discrete levels
Its called cell shading
Maybe 8 color levels
And snap each value to nearest 1/8

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and we should also print not only the mean , but also variance

you see the box plot

1. mean

2. median

3. lower quartile

4. upper quartile

5. smallest and greatest