Exceptions and warnings when handling these UCI datasets

[mlaky88]

german.csv car.csv buying.csv

[firefly-cpp]

Thanks, @mlaky88!

@zStupan, any ideas?

[zStupan]

For buying.csv no rules are found that's why it gives a division by 0 error when trying to compute the mean fitness when printing. I'll fix that and make it so it prints an empty array if the list is empty or something

For the other two, the csv file is formatted wrong. It's missing the label for the class attribute in the header. e.g: buying,maintanance,doors,persons,lug_boot,safety should be buying,maintanance,doors,persons,lug_boot,safety,class and same for german.csv

[firefly-cpp]

Thanks, @zStupan. Can we release the new version? Are you planning to add anything else?

[zStupan]

@firefly-cpp We can publish a new release.