Buildifier 0.12.0 includes initial support for reformatting .bzl files.
- Reformat all the bzl files.
- Expand the travis check to check the .bzl files also.
- Move install into a stand alone script to expand it.
- Support installing the latest bazel release.
- Move the script step into a stand along script to expand it.
- Support doing a build or running buildifier.
- Update the config to:
- Use the latest bazel release and head for tests (won't have
to update the config with each bazel release).
- Add a buildifer test to ensure the files are good.