Merge pull request #713 from jeff1evesque/python_data_validator

#710: Validate merged SVM dataset in 'data_validator.py'
Merge pull request #714 from jeff1evesque/python_data_validator

#710: data_validator.py, adjust printed error
Merge pull request #715 from jeff1evesque/python_data_validator

#710: Move 'dataset_validation' method
#716: svm_training.py, adjust comments
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:'
#7: data_creator.py, provide skeleton method for 'db_save_dataset'
#7: data_creator.py, fix minor typos
#719: svm_training.py, call 'db_save_dataset' method
#719: svm_training.py, adjust comments
#719: svm_training.py, minor indentation change
Merge pull request #720 from jeff1evesque/python_svm_training

#719: Call 'db_save_dataset' method in 'svm_training.py'
Merge branch 'master' into python_data_creator
#7: data_creator.py, 'import MySQLdb as DB'
#7: data_creator.py, create 'db_machine_learning' database if not exist
#721: config.py, add comment
#721: config.py, define 'Database' class class variables
#721: config.py, define 'get_db_host' method
#721: config.py, define 'get_db_username' method