Overview:
1) fixed up .gitignore file to use absolute paths (to project dir).
2) updated tox to run both manifest tests and flake8
3) updated yml file cause NULL for aws credentials causes an error on validation.
4) actually added the tests under tests/integration
DETAILS:
- Apparently a potential security issue with yaml.load vs yaml.safe_load.
Like pickling, yaml.load could result in arbitrary code being run.
- tox.ini file includes the flake8 settings for this project, build spec for 2.7
and line for eventually testing the project.