Add Support for saltstack.

Sledgehammer is updated to have saltstack software.

Create master and enable minions at all stages of bring-up.
Keys are sync between minions and master.

The jig is started, but not complete.

Comment away!
-1, we should only add a minion to a node as a consequence of a role that uses the salt jig being bound to a node.

This is how the chef and puppet jigs work.