DELETE return value

[balmas]

Per discussion in #2, DELETE on a property of a member should return the updated MemberItem

[balmas]

@fbaumgardt one possible problem I see with this is that asyncrhonous requests might not be able to return this immediately. That might be why I left these return values blank in the first place....

[balmas]

Per 13-June-2017 call agreed upon return success/failure only

[fbaumgardt]

No action needed.