snapshot status and node_role pages working with status lights
add screens to expose node_roles
tablize node list and add status light for node
Merge pull request #617 from cloudedge/pull-req-master-73a3e3e18e358219f228351d44e40fa990db914f

https://github.com/crowbar/barclamp-crowbar/pull/617

Merged by devtool for cloudedge