Added operator RandomSelection
Added HUXCrossover (to be tested)
Error found in class “DifferentialEvolution.java”, method “replacement”. All individuals in the entire population was replaced by the same offspring with index 0. Now fixed by replacing each corresponding offspring index "i"
Merge pull request #35 from jnietogit/master

Error found in class “DifferentialEvolution.java”, method “replacement”....
Merge branch 'master' of https://github.com/jMetal/jMetal
Added RankingAndCrowdingSelection (to be tested)
Merge pull request #36 from estebanpua/master

Added first version of the CMA-ES algorithm to jMetal 5.0