work towards DE238
Add contribution guidance

Add CONTRIBUTING.md that points to the same document in chef-cookbooks
Add mention of the contribution document in the top of the README.md
Merge pull request #43 from claco/contributing

Merged automatically by jenkins after successful build test
Merge remote-tracking branch 'origin/master' into DE238
build the cluster_nodes attribute from a search
Merge pull request #44 from rackerjoe/DE238

Merged automatically by jenkins after successful build test
default clustering to true
don't restart rabbitmq from keepalived
Merge pull request #45 from rackerjoe/master

Merged automatically by jenkins after successful build test
Remove the rewind
Merge pull request #46 from rackerjoe/master

Merged automatically by jenkins after successful build test