Merge pull request #717 from jeff1evesque/python_svm_training

#716: svm_training.py, adjust comments
#677: README.md, remove unnecessary 'Note:'
Merge pull request #718 from jeff1evesque/doc_jsonschema

#677: README.md, remove unnecessary 'Note:'
#719: svm_training.py, call 'db_save_dataset' method