please add support for Sforce-Auto-Assign http header

[jamesmanning]

https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/headers_autoassign.htm

This header allows changing the behavior of the active assignment rules during a given update to Accounts, Cases, or Leads.

My current workaround is to create a custom HttpClient, call .DefaultRequestHeaders.Add("Sforce-Auto-Assign", "FALSE"); and then pass that into the ForceClient constructor, but it'd be nice to have support for this more built-in to the SDK.

Thanks!

[VolcOne]

I faced the same problem
@wadewegner

Could you please review a patch.zip? Maybe you can add this opportunity in nearest time. It will be really great
There is PR with changes

Thanks.