Support standalone orgs & projects

[kelvintaywl]

This PR attempts to:

• [x] add integration tests for standalone orgs and projects
• [ ] update documentation on standalone examples
• [ ] update documentation for non-support re: standalone projects (e.g., schedule, checkout key)

resolves #63 resolves #54

notes

In this PR, i've updated the test user on CircleCI such that they have a linked Gitlab (Cloud) org and project. The tests here are against this Gitlab org and project.

You can see more on the updated README in this PR as well.