Ray.jl v0.0.1 release checklist

[omus]

Required:

• Decide if ray_julia_jll should be made into a submodule, and make it so (we decided to make this a submodule offline) Refactor ray_julia_jll into a submodule #158
• Codecov badge has been added to README: Add CI/CodeCov badges to README #151
• Most of the README has been transferred into docs: Add Documenter installation docs #153
• Documentation is automatically built in CI: Add Documenter installation docs #153
• Instructions exist for installing from pre-built binaries: Add Documenter installation docs #153
• Instructions exist for contributing/developing Ray.jl: Add Documenter installation docs #153
• A guide exists for building the pre-built binaries: Move artifact building instructions into docs #163
• Format repo: Apply YAS formatting #145

Optional:

• Ray.jl driver performs a runtime check when connecting to the Raylet to validate they are version compatible: Ray.jl driver validates Raylet version is compatible #175
• Use separate Project.toml for build_jll.jl: Use a separate project for ray_julia_jll/deps #150
• Stop using deps directory. Combine with gen directory? Possibly rename to cpp or build: Combine ray_julia_jll deps/gen directories #159
• Avoid using RAY_CHECK* #84
• Disable DEBUG logging for Ray in release

[omus]

We've released Ray.jl 0.0.1