Add ip helper to ease working woth IP addresses.
Automatically allocate an IP address for a node.
Add a noop jig for roles that just hold config data.
Add cohorts to roles as well
Fix sysdata.
Merge pull request #692 from VictorLowther/pull-req-master-402e9ce91111702c1f810a6a19545ee4d489a3f9

CB 2.0: Make the network barclamp really work, and make all the recipes really Chef11 compliant. [1/5]