Support for CHC

[danielmitre]

CHC (Eshelman 1991; Whitley et al. 1995) stands for cross-generational elitist selection, heterogeneous recombination, and cataclysmic mutation.

Some research I'm doing highly suggests the use of CHC for high computational cost evaluation problems, the main features of CHC are:

• Incest prevention: CHC prohibits the mating of two similar individuals by only allowing pairs with hamming distance above a threshold.
• Half Uniform Crossover (HUX): The offspring inherits the common genes and half of differing bits are selected at random to be crossed.
• Cataclysmic mutation: Once population has been converged, only the fittest individual survives and the remaining population is created by randomly flipping bits of the fittest with a configurable chance called divergence rate r.

HUX is a crossover operation and could be a configurable option in BinaryGenAlgSolver. The other ones could be additional flags as they affect different processes.