Saltstack client support for RH and SUSE OSes

I tested this with CentOS 6.5 and SLES 11SP3.

For RH based OSes the package is coming from EPEL, for SLES from the repo described in http://docs.saltstack.com/en/latest/topics/installation/suse.html

Fedora and OpenSUSE already have it in their base repos.