* Use the correct keyring for the OS (a refactor of the changes suggested in #41)

updated repositories entries for sane naming across Debian and Ubuntu entries
updated repo entries for security as syntax differs between Debian and Ubuntu
added repo entries for -updates (previously known as volatile)
updated map to use explicitly use grain os instead of implicitly use os_family
removed distribution_updates variable - syntax was Debian specific and invailid for Ubuntu
tested against Debian/stretch and Ubuntu/xenial

- Add template file
- Add pillar example

Ignore .kitchen dir

Add defaults for preferences mgmt

Add some pillar examples for preferences mgmt

Add tests for preferences

Add entries in the README file

Missing map.jinja entry