We want to use `clangd` as the language server.
`clangd` is an awesome language server that has many features and is very accurate.
But it needs a `compile_commands.json` to work.
This PR adds a popular bazel rule to generate this file.
Bazel has a rule for enforcing the version so we can just reuse that.
This redundant bazel version check logic in setup.py is also causing issue when building conda package, because conda has its own version of bazel and it doesn't support `--version`.
* Update Bazel (to 3.4.1), gRPC, boringssl, absl.
* Always reinstall Bazel if needing to upgrade to a new Bazel version.
* Add patch for properly detecting Windows Python headers when building gRPC.
* Add minimum Bazel version check.
* Update docs with new Bazel version.
* Modifying WORKSPACE file, so that you can make the project used as a thirdparty
* Modifying WORKSPACE file, so that you can make the project used as a thirdparty
* add some files
* modify some repositories
* modify the name of 'ray_deps_build_all'
* Use buildifier as bazel script linter
* Checkout golang version in travis
* Using golang-1.8-go in travis
* Add golang apt-repository
* Fix the bazel lint failure example.
* Address comment
