Move pso to bpso (Binary PSO)

Signed-off-by: Eduardo L. Buratti <elb09@c3sl.ufpr.br>
Add a (really) discrete PSO

Signed-off-by: Eduardo L. Buratti <elb09@c3sl.ufpr.br>
Modify proportion of islands between GPU and CPU

Signed-off-by: Eduardo L. Buratti <elb09@c3sl.ufpr.br>