Update init.sls

Added ZSH support
Update init.sls
Add Sysstat to package installs

Add sysstat to package installs.   Sysstat include SAR which allows users to get historical statistics from the OS so if there is a problem we can look back over the last 24 hour period to see what the disks/CPU/memory etc were doing during the problem.
Merge pull request #3 from jmoyer256/master

Add ZSH to package installs