Merge remote-tracking branch 'origin/master'

Author: 5argon

README.md

@@ -27,7 +27,7 @@ Leave empty or like it is if you don't want to use gRPC
 
 2. You could use `import` statement in your `.proto` file, which normally looks for all files in `--proto_path` folders input to the command line. (You cannot use relative path such as `../` in `import`) With protobuf-unity, `--proto_path` will be all parent folders of all `.proto` file in your Unity project *combined*. This way you can use `import` to refer to any `.proto` file within your Unity project. (They should not be in UPM package though, I used `Application.dataPath` as a path base and packages aren't in here.) Also, `google/protobuf/` path is usable. For example, utilizing [well-known types](https://github.com/protocolbuffers/protobuf/blob/master/src/google/protobuf/unittest_well_known_types.proto) or extending [custom options](https://developers.google.com/protocol-buffers/docs/proto#customoptions).
 
-3. Your generated class will then contains `using Google.Protobuf` usage, so additionally you have to add `Google.Protobuf.dll` precompiled library in your Unity project or link to your `asmdef`. This plugin itself doesn't need it, and I didn't bundle the `dll` along with this. You can go to [the repo](https://github.com/protocolbuffers/protobuf) and compile manually or download the Nuget package here https://www.nuget.org/packages/Google.Protobuf then use archive extract tools to get the .dll out. It contains targets such as .NET 4.6 and .NET Standard 1.0/2.0. Then it will ask for `System.Memory.dll` because it want to use `Span` class but Unity is not supporting it yet. By also [downloading it](https://www.nuget.org/packages/System.Memory/), it will then ask for missing references `System.Runtime.CompilerServices.Unsafe` and `System.Buffers`. To prevent you having to fetch missing `dll` over and over in chains, you can uncheck "Validate References" on the `System.Memory.dll`. Usually skipping the validation is bad, as if Protobuf ended up using the area of code in `System.Memory.dll` that needs them and could not dynamically link, then it probably crash. But so far seems like it is not the case.
+3. Your generated class will then contains `using Google.Protobuf` usage, so additionally you have to add `Google.Protobuf.dll` precompiled library in your Unity project or link to your `asmdef`. This plugin itself doesn't need it, and I didn't bundle the `dll` along with this. You can go to [the repo](https://github.com/protocolbuffers/protobuf) and compile manually or download [the Nuget package](https://www.nuget.org/packages/Google.Protobuf) then use archive extract tools to get the .dll out. It contains targets such as .NET 4.6 and .NET Standard 1.0/2.0. Then it will ask for `System.Memory.dll` because it want to use `Span` class but Unity is not supporting it yet. By also [downloading it](https://www.nuget.org/packages/System.Memory/), it will then ask for missing references `System.Runtime.CompilerServices.Unsafe` [here](https://www.nuget.org/packages/System.Runtime.CompilerServices.Unsafe/) and `System.Buffers` [here](https://www.nuget.org/packages/System.Buffers/). With all 4 libraries, it works in the real device just fine as far as I tested.
 
 ## How to use Google-made well known types