Applied solution from dotnet#394 by @Duracell1989 to cancel MonitorLogs Ttask

Author: David García Vives

src/Docker.DotNet/Endpoints/StreamUtil.cs

@@ -1,20 +1,31 @@
-using Newtonsoft.Json;
 using System;
 using System.IO;
 using System.Net.Http;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
+using Newtonsoft.Json;
 
 namespace Docker.DotNet.Models
 {
     internal static class StreamUtil
     {
         private static readonly Newtonsoft.Json.JsonSerializer _serializer = new Newtonsoft.Json.JsonSerializer();
 
-        internal static async Task MonitorStreamAsync<T>(Task<Stream> streamTask, DockerClient client, CancellationToken cancel, IProgress<T> progress)
+        internal static async Task MonitorStreamAsync(Task<Stream> streamTask, DockerClient client, CancellationToken cancel, IProgress<string> progress)
         {
-            await MonitorStreamForMessagesAsync<T>(streamTask, client, cancel, progress);
+
+            using (var stream = await streamTask)
+            {
+                using (var reader = new StreamReader(stream, new UTF8Encoding(false)))
+                {
+                    string line;
+                    while ((line = await reader.ReadLineAsync()) != null && !cancel.IsCancellationRequested)
+                    {
+                        progress.Report(line);
+                    }
+                }
+            }
         }
 
         internal static async Task MonitorStreamForMessagesAsync<T>(Task<Stream> streamTask, DockerClient client, CancellationToken cancel, IProgress<T> progress)