updated sample, readme, update remainder old code

Author: locus84

README.md

@@ -229,6 +229,33 @@ BundleSystem.BundledAssetPath MyAsset;
     }
 ```
 
+\
+**Async/Await Examples**
+```cs
+    async Task AsyncAwaitSamples()
+    {
+        //initialize with task aupport
+        {
+            //initialize bundle system & load local bundles
+            await BundleManager.Initialize();
+
+            //get download size from latest bundle manifest
+            var manifestReq = await BundleManager.GetManifest();
+            if (!manifestReq.Succeeded)
+            {
+                //handle error
+                Debug.LogError(manifestReq.ErrorCode);
+            }
+
+            //load asset with async/await
+            using (var loadReq = await BundleManager.LoadAsync<GameObject>("Prefab", "PrefabName"))
+            {
+                var instance = BundleManager.Instantiate(loadReq.Asset);
+            }
+        }
+    }
+```
+
 \
 **Editor Test Script**
 ```cs

Runtime/BundleManager.Memory.cs

@@ -306,7 +306,7 @@ static IEnumerator ReloadBundle(string bundleName, LoadedBundle loadedBundle)
             yield return bundleReq.SendWebRequest();
             loadedBundle.IsReloading = false;
 
-            if (bundleReq.isNetworkError || bundleReq.isHttpError)
+            if (!Utility.CheckRequestSuccess(bundleReq))
             {
                 Debug.LogError($"Bundle reload error { bundleReq.error }");
                 yield break;

Samples~/Sample/ApiSampleScript/LocusBundleSample.cs

@@ -1,6 +1,7 @@
 using System.Collections;
 using UnityEngine;
 using BundleSystem;
+using System.Threading.Tasks;
 
 public class LocusBundleSample : MonoBehaviour
 {
@@ -111,6 +112,34 @@ IEnumerator ApiSamples()
         }
     }
 
+    async Task AsyncAwaitSamples()
+    {
+        //initialize with task aupport
+        {
+            //show log message
+            BundleManager.LogMessages = true;
+
+            //show some ongui elements for debugging
+            BundleManager.ShowDebugGUI = true;
+
+            //initialize bundle system & load local bundles
+            await BundleManager.Initialize();
+
+            //get download size from latest bundle manifest
+            var manifestReq = await BundleManager.GetManifest();
+            if (!manifestReq.Succeeded)
+            {
+                //handle error
+                Debug.LogError(manifestReq.ErrorCode);
+            }
+
+            //load asset with async/await
+            using (var loadReq = await BundleManager.LoadAsync<GameObject>("Prefab", "PrefabName"))
+            {
+                var instance = BundleManager.Instantiate(loadReq.Asset);
+            }
+        }
+    }
 
     IEnumerator AdvancedApiSamples()
     {