新增：接收非JSON格式数据委托

Author: fengyunhai

Qiniu/Http/CompletionHandler.cs

@@ -7,4 +7,12 @@ namespace Qiniu.Http
     /// <param name="respInfo">请求回复信息</param>
     /// <param name="response">请求回复内容</param>
     public delegate void CompletionHandler(ResponseInfo respInfo, string response);
+
+    /// <summary>
+    /// HTTP请求结果(非json/二进制数据)
+    /// </summary>
+    /// <param name="respInfo"></param>
+    /// <param name="respData"></param>
+    public delegate void RecvDataHandler(ResponseInfo respInfo, byte[] respData);
+
 }