Does transformation affect `_rev` when replicating?

[stuartpb]

Was just thinking about this: if I put an outgoing transformation on a database and replicate to a fresh database, is that new database going to now think it has the same revision as the original database, with altered content? What about if I replicate a document that the database has - is it going to reject the replication, ignore it (thinking it already has the document), or record an update?

This seems like it'd be an important reason for addressing #37, and could be (part of) replication issues that have been reported like #8.

[nolanlawson]

Yes, transformation is a silent operation; i.e. there is no way to know whether a replication was transformed or not.