* [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
* [cmark] Add cmark_markdown_to_html fuzzer
* [cmark] Use correct filename for seed corpus
* [cmark] Use upstream fuzz harness
* [cmark] Do not use $WORK for temporary files
* [cmark] Generate seed corpus from michelf/mdtest repo
* [cmark] Add @kivikakk as an auto CC
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