changed deleteRow method to use Upsert and added a helper class (Payl…

[StokedPrune]

I modified the existing deleterow method to basically redirect to the sodaclient.Upsert method. It still takes the same parameters and returns a SodaResult.
I added another DeleteRow method that takes a list if RowId's so can do a bulk delete now. I called it DeleteRow also, to keep the changes to a minimum, not sure if better to call it DeleteRows?
I also added a helper class into Utilities "Payloadbuilder.cs" which just takes the RowId('s) and constructs into the required json format.
I didnt add any tests, not sure if any needed, and also i'm not very familiar with test frameworks.
I wrote the same logic into my application and has been working fine. See what you think
Thanks
Mick

[AppVeyorBot]

✅ Build SODA.NET 0.10.1-111-dsdieqgw completed (commit b24265ad07 by @)

[AppVeyorBot]

✅ Build SODA.NET 0.10.1-111-dsdieqgw completed (commit b24265ad07 by @)

[coderpatros]

@thekaveman this will fix issue #85 that my organisation has been hitting. It would be great if this could be included in the next release.