updated README to 1.5.0.2 (#18)

Co-authored-by: Victor Kulaga <victorku@microsoft.com>

README.md

@@ -3,6 +3,8 @@
 ## Overview
 This is a PlayFab Party plugin for game development on Unity.
 
+_(Please use Git client with Large File Storage (LFS) support to work with this repo)_
+
 ## Supported platforms:
 - Windows
 - Microsoft Game Core (just "Game Core" below)
@@ -12,14 +14,14 @@ This is a PlayFab Party plugin for game development on Unity.
 ## Version
 |Party Unity SDK (main)
 |-|
-|1.5.0.1-main.0
+|1.5.0.2-main.0
 
 Officially supported versions of PlayFab Party binaries with this release, by platform:
 
 Platform|Version
 |-|-|
 Windows|1.5.0
-Game Core|1.5.* (GDK)
+Game Core|1.5.* (distributed with Microsoft GDK)
 iOS|1.5.0
 Android|1.5.0
 
@@ -85,4 +87,39 @@ The SDK contains the following:
     - Two PlayFabParty.framework libraries are provided: one for real iOS devices and another one for iOS Simulator (x64). Make sure to enable only one of them for iOS platform before building. The framework for a device is enabled by default (see Inspector settings for PlayFabParty.framework folders)
 - If you are targeting Android: please make sure to allow your app to use microphone on the device.
 
-For a detailed guide please check out [Quickstart: PlayFab Party Unity Plugin](https://docs.microsoft.com/en-us/gaming/playfab/features/multiplayer/networking/party-unity-plugin-quickstart)
+For a detailed guide please check out [Quickstart: PlayFab Party Unity Plugin](https://docs.microsoft.com/en-us/gaming/playfab/features/multiplayer/networking/party-unity-plugin-quickstart)
+
+## Error Handling
+The error callbacks used in `PlayFabMultiplayerManager` API may return error data which includes `PlayFabMultiplayerManagerErrorType`. It can be used to determine a type of the error that the user app may act on.
+
+In addition to error types, there are also specific Party error codes. They are intended for diagnostics and logging, not for programmatic error handling.
+
+### Error Codes
+The underlying Party C++ library may return error codes that Party Unity plugin will pass on to the user app. All possible Party error codes and their descriptions are listed in `PartyErrors.md` file which is distributed with a public Party C++ library NuGet package, e.g.:
+https://www.nuget.org/packages/Microsoft.PlayFab.PlayFabParty.Cpp.Windows/
+
+It is located at the root of the NuGet package content.
+
+## Logging
+The underlying Party C++ library includes logging capabilities with a configurable verbosity level. Logging configuration is defined in `PlayFabPartyLogger.json` file which can be deployed as an asset along with the application. An example of configuration file:
+
+```json
+{
+    "enabled": false,
+    "bufferSize": 16384,
+    "maxNumberOfItemsInBatch": 100,
+    "maxBatchWaitTimeInSeconds": 1,
+    "readBufferWaitTimeInMilliseconds": 1,
+    "logFolder": "/platform-specific-path/",
+    "logLevel": "VERBOSE",
+    "xrnLogEnabled": false,
+    "maxLogFileSizeInMegabytes": 0
+}
+```
+
+When this file is detected by the application in runtime it will use it to enable logging as configured. The path to log files on a Stadia instance is specified by "logFolder" property. The following verbosity levels are currently supported:
+1. `VERBOSE` - everything
+2. `INFO` - less than everything, only important messages and errors
+3. `ERROR` - only errors
+
+The logging is disabled by default, but can be enabled with "enabled" property set to `true`.