* Add yaml output plugin
Using YAML instead of JSON for detailed output can (IMO) improve
readability; especially for tasks with either lots of output, or
multi-line output.
* Fix yaml output plugin documentation
* Added copyright header to yaml.py
* Moved mention of yaml output plugin to `New Modules` section
* Use AnsibleDumper in yaml output plugin
Also moved the `represent_scalar` setup into the init method. As a
global statement, it was causing exceptions trying to get an `id`
field that does not exist.
* Remove trailing whitespace
* Remove useless json.loads/dumps from yaml output
David M. Lee