Move managed client to separate nuget.

Extensions/MQTTnet.Extensions.ManagedClient/MqttFactoryExtensions.cs

@@ -0,0 +1,24 @@
+using System;
+using MQTTnet.Client;
+using MQTTnet.Diagnostics;
+
+namespace MQTTnet.Extensions.ManagedClient
+{
+    public static class MqttFactoryExtensions
+    {
+        public static IManagedMqttClient CreateManagedMqttClient(this IMqttClientFactory factory)
+        {
+            if (factory == null) throw new ArgumentNullException(nameof(factory));
+
+            return new ManagedMqttClient(factory.CreateMqttClient(), new MqttNetLogger().CreateChildLogger());
+        }
+
+        public static IManagedMqttClient CreateManagedMqttClient(this IMqttClientFactory factory, IMqttNetLogger logger)
+        {
+            if (factory == null) throw new ArgumentNullException(nameof(factory));
+            if (logger == null) throw new ArgumentNullException(nameof(logger));
+
+            return new ManagedMqttClient(factory.CreateMqttClient(), logger.CreateChildLogger());
+        }
+    }
+}