Merge pull request #626 from jeff1evesque/doc_linux_packages

#624: Update 'Linux Packages' subsection
#623: README.md, update GIT subsection
Merge pull request #627 from jeff1evesque/doc_git

#623: README.md, update GIT subsection
#622: style.scss, change error to be bold and red
Merge pull request #629 from jeff1evesque/scss_style

#622: style.scss, change error to be bold and red
#461: svm_json.py, define initial file
#461: svm_json.py, adjust docblock
#461: svm_json.py, skeleton methods for json conversion
#630: svm_training.py, minor comment change
#632: data_validator.py, update docblock
Merge pull request #633 from jeff1evesque/python_data_validator

#632: data_validator.py, update docblock
#632: data_validator.py, further adjust docblock(s)
Merge pull request #634 from jeff1evesque/python_data_validator

#632: data_validator.py, further adjust docblock(s)
#630: svm_training.py, import 'JSON' class from 'svm_json.py'
#630: svm_training.py, instantiate JSON class
#63): svm_training.py, minor comment changes
#630: svm_training.py, adjust overall file docblock
#630: svm_training.py, indent under 'else' statement
#630: svm_training.py, move 'json_dataset' under 'else' statement
#630: svm_training.py, define 'if-else' for 'json_dataset'