Wakeful bug fixes:
  - no longer broadcasts a change when `patch: true` and there are no changes to broadcast
  - broadcast clones attributes rather than whole model to avoid triggering the constructor
    and causing a small mess
incremented version to 0.1.4
added isReallyNew() method to allow differentiating between newly-instantiated and newly-created documents — backbone.js internal isNew() mechanism was no good here since Backbone.Drowsy uses client-generated document ids