* Adding ZWave CentralScene activation handler.
* Migrated CentralScene logic to node_entity.py
Removed extraneous logging
Modified scene_activated event to send the scene_id and scene_data separately
* Adding unit test for ZWave central scene activation
* Removed return to allow node statistics to update after central scene message is received
* Use standard entity_ids for zwave entities
* Include temporary opt-in for new entity ids
* Update link to blog post
* Update tests
* Add old entity_id as state attribute
* Expose ZWave value details
* Update tests
* Also show new_entity_id
* Just can't win with this one