made GUI for using the classifier.
fixed bug in arffWriter where it would crash if there was no positive dataset
added methods in QueryHandler to obtain and delete test sets
added method in QueryHandler to write from fasta to arff
made GUI for converting file formats
fixed bug where ClassifierUser would write a temporary arff file with the .tmp extention, which WEKA would not accept
fixed bug in ClassifierUser where percentages instead of fractions of 1 were used