neuroevo 0.6.0

IMMEDIATE DEPRECATION WARNING: this gem has been deprecated. Please find the same functionality with extended feature, better scoping and integration to more methods in the [`machine_learning_workbench` gem](https://github.com/giuse/machine_learning_workbench): check out the [nes classes](https://github.com/giuse/machine_learning_workbench/tree/master/lib/machine_learning_workbench/optimizer/natural_evolution_strategies), [neural network classes](https://github.com/giuse/machine_learning_workbench/tree/master/lib/machine_learning_workbench/neural_network), and [neuroevo example](https://github.com/giuse/machine_learning_workbench/blob/master/examples/neuroevolution.rb). You should be able to transition in no time. Any problem: just ping me. Apologies for the inconvenience, hope you will enjoy the new gem!