Feature/delete global ids

[leighghunt]

Updated ApplyEdits to allow deleting with GlobalIds.

A couple of things to note:

• I've had to comment out a couple of assertions as they seem to generate false negatives. Let me know if you want me to review these again, but seems like a possible issue with REST service. Checking updates/deletes in destination service indicate test is successful.
• This incorporates my earlier retry-BatchQuery changes, o let me know if you'd like me to resubmit if/when you accept that change, or if you'd like me to isolate it from that change.

[davetimmins]

I've added the delete using global IDs in v1.10.0. I decided to omit the retry functionality at the moment as I think it would be more useful for any operation but want to think about the best way to add that first.