Changes to the metadata format were approved here:
https://github.com/ansible/proposals/issues/54
* Update documentation to the new metadata format
* Changes to metadata-tool to account for new metadata
* Add GPL license header
* Add upgrade subcommand to upgrade metadata version
* Change default metadata to the new format
* Fix exclusion of non-modules from the metadata report
* Fix ansible-doc for new module metadata
* Exclude metadata version from ansible-doc output
* Fix website docs generation for the new metadata
* Update metadata schema in valiate-modules test
* Update the metadata in all modules to the new version
* Change example syntax on authorized_key module
* Change example syntax on cron module
* Change example syntax on group module
* Change example syntax on hostname module
* Change example syntax on seboolean module
* Change example syntax on selinux module
* Change example syntax on service module
* Change example syntax on sysctl module
* Change example syntax on systemd module
* Change example syntax on user module
* Change example syntax on debug module
* Change example syntax on fail module
* Change example syntax on include module
* Change example syntax on include_role module
* Change example syntax on include_vars module
* Change example syntax on pause module
* Change example syntax on wait_for module
* Change example syntax on apache2_module module
* > Change example syntax on django_manage module
* Change example syntax on htpasswd module
Toshio Kuratomi
Matt Martz
Matt Clay
Fabio Alessandro Locati
Sam Doran
Rezart Qelibari
John R Barker
Simon Li
Brian Coca
bambou
Sean Chittenden
Greg DeKoenigsberg
Sébastien Gross
Michael DeHaan