* [presubmit] Enforce language attribute in projectt.yaml to be always set.
* Update documentation, better presubmit check, new project template.
* add docstring to templates.py
* Add example values in the project.yaml template and remove python value for now
* Add "project: c++" to 256 projects
* format
* Add labels and selective_unpack sections to the presubmit check
* fix incorrect auto_ccs format in three projects
* fix nss emails after rebase
* [docs] Document shiny new badge in the docs
Use monorail project link instead of build logs
Monorail link has advantage of showing previously found bugs.
It also shows any build failures (though the issue may be hard to find in long-lasting build failures).
The link sorts by date a bug was opened, thus some verified bugs will be shown before more recently opened ones.