Merge pull request #30 from chrish42/master

Add support for RHEL, etc.
Adding File for CentOS
Changed the grain os to os_family
Fix for CentOS
Merge pull request #33 from D3r3ck/master

Using the family instead the operating system
resolve conflicts
Adding File for CentOS
resolve conflicts
Merge commit 'f34dcafe88ca1ca1fb6adb5257b5041e1ecbbe6c'