Add support for Debian osfamily

Basically just set the proper defaults in params.pp and add a Debian
operating system (Ubuntu 12.04) to spec_helper, thus enabling spec tests
for the Debian osfamily.
Fix formatting in standard usage example

Align fat commas, proper indentation.
Merge pull request #2 from antaflos/patch-1

Fix formatting in standard usage example
Merge pull request #1 from antaflos/debian_support

Add support for Debian osfamily
Version 0.1.1 with basic debian support