Added (ported back) features from initial design [retrofit,moshi,kotpref]

Marked most of the old classes using Networking as deprecated to clearly visualise their future removal

net/src/main/java/com/topjohnwu/net/Networking.java

@@ -13,6 +13,7 @@ import java.net.URL;
 
 import javax.net.ssl.HttpsURLConnection;
 
+@Deprecated
 public class Networking {
 
     private static final int READ_TIMEOUT = 15000;