Sync - docs updates

Author: Ivan Dlugos

example/flutter/objectbox_demo_sync/lib/main.dart

@@ -66,7 +66,8 @@ class ViewModel {
     _query = _box.query().order(dateProp, flags: Order.descending).build();
 
     // TODO configure actual sync server address and authentication
-    // 10.0.2.2 is your host PC if an app is run in an emulator.
+    // 10.0.2.2 is your host PC if an app is run in an Android emulator.
+    // 127.0.0.1 is your host PC if an app is run in an iOS simulator.
     // For other options, see objectbox/lib/src/sync.dart
     final syncClient =
         Sync.client(_store, 'ws://10.0.2.2:9999', SyncCredentials.none());

sync_flutter_libs/README.md

@@ -1,6 +1,6 @@
-ObjectBox (with Sync) libraries for Flutter
+ObjectBox (with [Sync](https://objectbox.io/sync)) libraries for Flutter
 ===========================================
-This package provides native ObjectBox library as a flutter plugin for supported platforms.
+This package provides native ObjectBox library, including [Sync](https://objectbox.io/sync) client, as a flutter plugin for supported platforms.
 You should add this package as a dependency when using [ObjectBox](https://pub.dev/packages/objectbox) with Flutter.
 
 See package [ObjectBox](https://pub.dev/packages/objectbox) for more details and information how to use ObjectBox it.