Added reference project

ref/Net/Rest/IRestRequest.cs

@@ -0,0 +1,23 @@
+namespace Discord.Net.Rest
+{
+    public interface IRestRequest
+    {
+        string Method { get; }
+        string Endpoint { get; }
+        object Payload { get; }
+    }
+    public interface IRestRequest<ResponseT> : IRestRequest
+        where ResponseT : class
+    {
+    }
+
+    public interface IRestFileRequest : IRestRequest
+    {
+        string Filename { get; }
+        Stream Stream { get; }
+    }
+    public interface IRestFileRequest<ResponseT> : IRestFileRequest, IRestRequest<Message>
+        where ResponseT : class
+    {
+    }
+}