Added initial version of standard supervised classifier kfold validation
Added initial version of standard supervised classifier kfold validation

Outputs PR curve plots using sklearn.cross_validataion for fold
selection and sklearn.metric for PR curve generaion.

Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK,Purg/SMQTK