Renamed FitnessValuePair to GenomeFitnessPair, renamed field from
value to genome.
Fixed default numParents and NumChildren to be something potentially
useful (5,20). Fixed references to GenomeFitnessPairs. Made Best and
BestQuality into a GenomeFitnessPair.
Actually removed old FitnessValuePair class from repository.
Reverted problem.random() to problem.create(). No problem has a method
.random(). BitStringProblem and subclasses are the only problems with
a static create method.
Fixed an incorrect reference from bestQuality to best.fitness