Add 2 new sets of scripts

authors: return a list sorted of the authors of a given project.

manifest: return the status of commits from a manifest file.

Signed-off-by: Kévin THIERRY <kevin.thierry@open.eurogiciel.org>
Do a lot of stuff

* Add the return value "URL"
* Correct a bug that always returned the same change-id when gerrit
return multiple results
* Update templates

This is a bad commit.

Signed-off-by: Kévin THIERRY <kevin.thierry@open.eurogiciel.org>