Added code docs, added ContinueOnQueryResponse

CryptoExchange.Net/Interfaces/IRateLimiter.cs

@@ -2,8 +2,18 @@
 
 namespace CryptoExchange.Net.Interfaces
 {
+    /// <summary>
+    /// Rate limiter interface
+    /// </summary>
     public interface IRateLimiter
     {
+        /// <summary>
+        /// Limit the request if needed
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="url"></param>
+        /// <param name="limitBehaviour"></param>
+        /// <returns></returns>
         CallResult<double> LimitRequest(RestClient client, string url, RateLimitingBehaviour limitBehaviour);
     }
 }