Humanmodels

Corrected a few bugs. Now both HumanClassifier and HumanRegressor accept the 'n_jobs' parameter to speed up the optimization process in .fit(X, y)

This version includes small improvements on passing options to the optimizers in HumanRegressor.

The basic functionalities of HumanClassifier and HumanRegressor all work. The models, once trained, should be fully compatible with scikit-learn Estimators (plus ClassifierMixin and RegressorMixin, respectively).

This release is not fully tested, and there are likely several undiscovered bugs. Use it at your own risk.