#12 Improve CSV loading

[Timo Klerx]

When loading a CSV file with quotes, neuroph does not recognize them as quote chars and thus is unable to parse the quoted number.
It is not a big deal, but would be nice
It would also be nice to add the functionality to skip headlines in the csv.
Last, an option which decimal separator to use is missing.

TrainingSet.createFromFile is the method to improve.