added facade interfaces
added facade interfaces

koltsov-ps/ModernHttpClient,leonardors/ModernHttpClient,nachocove/ModernHttpClient-demo,xamarin/ModernHttpClient,scoodah/ModernHttpClient,kensykora/ModernHttpClient,pacificIT/ModernHttpClient,tomgilder/OkHttpClient,nachocove/ModernHttpClient,paulcbetts/ModernHttpClient,djlewisxactware/ModernHttpClient,tpurtell/ModernHttpClient,tomgilder/OkHttpClient,mattleibow/ModernHttpClient