* [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
* example project: fix minor problems with standalone fuzzer
* typo: "successfull" -> "successful"
* main should explicitly return 0 on success
* example project: fix minor problems with Makefile
* make "all" the first target
* use LIB_FUZZING_ENGINE to reference fuzzer in all places
* example project: fix typos in README
* Add upstream qpdf maintainer as auto_cc for qpdf
I am adding myself (using my Google account) as an auto_cc in
preparation for taking over ownership of the qpdf project and doing a
full integration with oss-fuzz.