* [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
* Basic skeleton for tidy-html5 OSS-Fuzz integration.
* Added two tidy-html5 fuzzers: One that exercises the HTML parser and one that exercises the configuration file parser.
* Added the copyright headers.
* Clarified why the tidy config fuzzer uses a file interface.
Stefan Bucur