Big release!

What's Changed

• Add CODE_OF_CONDUCT.md by @GrandMoff100 in #108
• Added Automatic Testing Server and Test Suite by @GrandMoff100 in #112
• Added Refresh Tokens to the Authentication section of the docs. by @GrandMoff100 in #114
• Integrate coverage reports by @GrandMoff100 in #116

Lots of stuff has changed in this release.
Be aware that this is a non-backwards compatible release.
Docs have been polished up.
Project structure has been reorganized.
And lots of tools to help manage the codebase quality have been added!

Full Changelog: v3.0.4...v4.0.0