Merge pull request #672 from jeff1evesque/python_config

#671: config.py, correct method names
#628: data_validator.py, change 'prelearning_data_validation' -> 'dataset_validation'
Merge pull request #673 from jeff1evesque/python_data_validator

#628: 'prelearning_data_validation' -> 'dataset_validation'
#462: svm_training.py, call 'dataset_validation'
Merge pull request #674 from jeff1evesque/python_svm_training

#462: svm_training.py, call 'dataset_validation'
#671: config.py, undo changes from 26f6b75