Merge pull request #447 from jeff1evesque/python_svm_training

#445: Properly call 'xml_validation' in 'svm_training.py'
#448: ajax_data.js, adjust comment
#448: ajax_data.js, adjust comment 'store 'xml file(s)' in array'
#448: ajax_data.js, add 'else if' url logic
#448: ajax_data.js, use '(this).val()'
#448: ajax_data.js, remove unnecessary 'console.log()'
#448: ajax_data.js, adjust code indentation
#448: ajax_data.js, adjust comment
Merge pull request #449 from jeff1evesque/js_ajax_data

#448: Properly append 'xml_file(s)' in 'ajax_data.js'
#448: ajax_data.js, undo modifications
#448: ajax_data.js, add more to docblock comment
Merge pull request #450 from jeff1evesque/js_ajax_data

#448: Undo changes to 'ajax_data.js'
#440: data_validator.py, undo code modifications
#440: data_validator.py, minor comment change
Merge pull request #451 from jeff1evesque/python_data_validator

#440: Undo changes to 'data_validator.py'
#445: svm_training.py, undo changes