SubHardware in the sample code (#332)

* SubHardware in the sample code

Some of the people who run the sample code may not understand why they cannot see the information from the motherboard. It's a good idea to show the subhardware sensors right away.

README.md

@@ -63,7 +63,7 @@ public void Monitor()
         IsControllerEnabled = true,
         IsNetworkEnabled = true,
         IsStorageEnabled = true
-	};
+    };
 
     computer.Open();
     computer.Accept(new UpdateVisitor());
@@ -71,12 +71,24 @@ public void Monitor()
     foreach (IHardware hardware in computer.Hardware)
     {
         Console.WriteLine("Hardware: {0}", hardware.Name);
+        
+        foreach (IHardware subhardware in hardware.SubHardware)
+        {
+            Console.WriteLine("\tSubhardware: {0}", subhardware.Name);
+            
+            foreach (ISensor sensor in subhardware.Sensors)
+            {
+                Console.WriteLine("\t\tSensor: {0}, value: {1}", sensor.Name, sensor.Value);
+            }
+        }
 
-        foreach(ISensor sensor in hardware.Sensors)
+        foreach (ISensor sensor in hardware.Sensors)
         {
             Console.WriteLine("\tSensor: {0}, value: {1}", sensor.Name, sensor.Value);
         }
     }
+    
+    computer.Close();
 }
 ```