#172: data_validator.py, ensure passed in dataset is json formatted
#172: data_validator.py, add 'session_type' argument to constructor
#172: svm_training.py, add 'session_type' argument 'training'
#172: data_validator.py, minor class property name typo
#172: data_validator.py, change 'form_data' -> 'svm_data'
#172: data_validator.py, add docblock above the constructor
#172: data_validator.py, ensure 'training' session has json input data
#172: data_validator.py, redefine comments
#172: data_validator.py, sys.exit() if input data not json during training
#172: svm_training.py, minor comment change
#172: data_validator.py, relocate use of 'lower()' method
Merge pull request #178 from jeff1evesque/python_data_validator

#172: Define 'form_validation()' in 'data_validator.py'