Need to specify the metadata on the import doc object for deletion processing

The documentation does not specify the fact that

• _deleted will show on the document object
• _id and _rev will not show on the document object

I would also expect that as an importer would in many cases manage deletion of extant objects, that the example code be included to have a

```
if (doc._deleted == true)

```

with a comment to specify why this is required. Else - its easy to make a footgun where you only process created or updated documents based on a document key, but deletions are ignored.

Reporter: Andrew Lipscomb
E-mail: andrew.lipscomb@swarmfarm.com