Feature additions

Added features submitted via pull requests as follows:

Allow creating tunnel bits from class args Pull request #13 by jcpunk
Improve ubuntu support Pull Request #12 by liwo
Add some support for Ubuntu 16.04 #11 by mjhartwick

Thanks for the pull requests and keep em coming. I don't personally use this module any more, but happy to maintain it.

Cheers.

Bugfixes

Multiple bug fixes and minor enhancements.

RHEL7 Support Added

• some minor bugfixes
• Added support for RHEL7/Centos7 systemd