Remove RPC from main distribution (#925)

experiment/Discord.Net.Rpc/DiscordRpcConfig.cs

@@ -0,0 +1,33 @@
+using Discord.Net.WebSockets;
+using Discord.Rest;
+using System;
+
+namespace Discord.Rpc
+{
+    public class DiscordRpcConfig : DiscordRestConfig
+    {
+        public const int RpcAPIVersion = 1;
+
+        public const int PortRangeStart = 6463;
+        public const int PortRangeEnd = 6472;
+
+        /// <summary> Gets or sets the time, in milliseconds, to wait for a connection to complete before aborting. </summary>
+        public int ConnectionTimeout { get; set; } = 30000;
+
+        /// <summary> Gets or sets the provider used to generate new websocket connections. </summary>
+        public WebSocketProvider WebSocketProvider { get; set; }
+
+        public DiscordRpcConfig()
+        {
+#if FILESYSTEM
+            WebSocketProvider = () => new DefaultWebSocketClient();
+#else
+            WebSocketProvider = () =>
+            {
+                throw new InvalidOperationException("The default websocket provider is not supported on this platform.\n" +
+                    "You must specify a WebSocketProvider or target a runtime supporting .NET Standard 1.3, such as .NET Framework 4.6+.");
+            };
+#endif
+        }
+    }
+}