Removed old bucket system, cleaned up api calls. Fixed compile errors.

src/Discord.Net.Core/RequestOptions.cs

@@ -6,10 +6,24 @@
 
         /// <summary> The max time, in milliseconds, to wait for this request to complete. If null, a request will not time out. If a rate limit has been triggered for this request's bucket and will not be unpaused in time, this request will fail immediately. </summary>
         public int? Timeout { get; set; }
+        public string BucketId { get; set; }
+        public bool HeaderOnly { get; internal set; }
+
+        internal bool IgnoreState { get; set; }
+        
+        public static RequestOptions CreateOrClone(RequestOptions options)
+        {
+            if (options == null)
+                return new RequestOptions();
+            else
+                return options.Clone();
+        }
 
         public RequestOptions()
         {
             Timeout = 30000;
         }
+
+        public RequestOptions Clone() => MemberwiseClone() as RequestOptions;
     }
 }