Merge pull request #173 from jeff1evesque/python_data_validator

#170: Remove 'form_sanitation()' in 'data_validator.py'
#174: svm_training.py, minor comment change
Merge pull request #175 from jeff1evesque/python_svm_training

#174: svm_training.py, minor comment change
#176: data_validator.py, rename 'form_validation' -> 'data_validation'