HTTP Response for Custom remoteUpdate Handler

[kyork-cl]

Currently, the remoteUpdate handler can only return a 200 or 500 HTTP response. I have a device type for which the consumer of the API can't update via PUT, but neither of these response codes is useful to the user. Being able to supply a custom response code like a 403 would be useful for this case.

It looks like this applies to the remoteDestroy as well.