Add 'ephemeral' node type
Ephemeral nodes should be valid
Formatting update
Add 'advertise' / 'buddycloud#advertise_node' configuration field type
We don't need 'ephemeral' nodes
Add an ephemeral field type
Don't advertise nodes we don't wish to advertise
Default ephemeral to false
Merge pull request #264 from surevine/ephemeral-disco

Don't advertise nodes we don't wish to be advertised