NEEDS: some smart fitness function to present the performance
Crossover:
1 2 2 4 4 | 1 3 5 5 3
2 3 1 2 3 | 1 5 5 4 4
1 2 2 4 4 1 5 5 4 4
2 3 1 2 3 1 3 5 5 3
-----------------------normalize to play by the rules
1 2 2 4 x 1 5 5 4 x <- x chosen by random
2 x 1 2 x 1 3 5 5 3
----------------------
1 2 2 4 3 1 5 5 4 3
2 4 1 2 4 1 3 5 5 3