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
* Add Check Mode capability to kernel_blacklist module
* Add suggested changes from @tmshn
* Pass a bool into `Blacklist` that'll just be `module.check_mode`
* Move detection and creation of a file to a separate function within `Blacklist`
* If there's no file on the system and we are running under `Check Mode`, set `self.filename` to `os.devnull` AND mark a change, as the module would have created an empty file.
* Whenever a `self.filename` is being opened in a mode where changes can be made, replace with an if statement that checks `self.checkmode` and if true then open up `os.devnull` instead
* Update validate-modules
* Validates ANSIBLE_METADATA
* Ensures imports happen after documentation vars
* Some pep8 cleanup
* Clean up some left over unneeded code
* Update modules for new module guidelines and validate-modules checks
* Update imports for ec2_vpc_route_table and ec2_vpc_nat_gateway