Update formatting of pkgng module
Make annotation modification more robust in pkgng module
Improve check_mode logic in pkgng module
Use helper function to call pkg in pkgng module

* By using an argument list instead of an argument string we ensure that the
  quoting is always correct.
* Fixed some calls to module.fail_json to use only keyword arguments.
* The error reporting has been improved by returning more data.
Add jail support to pkgng module