Updated .gitignore per documentation on the Internet and consultation with Justin
Updated .gitignore per documentation on the Internet and consultation with Justin

jjinux/dart-with-x-samples,financeCoding/dart-with-x-samples,financeCoding/dart-with-x-samples,financeCoding/dart-with-x-samples,jjinux/dart-with-x-samples,financeCoding/dart-with-x-samples,jjinux/dart-with-x-samples,jjinux/dart-with-x-samples