Ho’oponopono helps us

• Adapter fixDeleteBug flag. Defaults to true. Fixes emberjs/data#4963 and related issues that don't seem to work well with server side delete notifications.
• Track newly inserted records, so unloadedDocumentChanged is not called for those. Otherwise a race-condition can occur where onChange is faster than the save. This can result in the document being inserted in the store via unloadedDocumentChanged before the save returns to ember-data. This will result in an assert that the id is already present in the store.