Additional Source Control providers support

[anonymous_user_48d0c7fc1 (anonymous_user_48d0c7fc)]

@Tom Sarkanen;9559

Disclaimer: I wrote the plugins that currently power the source control integration for Unreal Engine 4.

I have a rough draft of a blog post that tries to go into some detail about how one might implement different source control providers in the Editor - does this sound like something that might be useful to you guys?

That would be incredibly helpful Tom.