codec rewrite

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

README.md

@@ -1,30 +0,0 @@
-# GRPC Server
-
-The grpc server is a [micro.Server](https://godoc.org/github.com/micro/go-micro/server#Server) compatible server.
-
-## Overview
-
-The server makes use of the [google.golang.org/grpc](google.golang.org/grpc) framework for the underlying server
-but continues to use micro handler signatures and protoc-gen-micro generated code.
-
-## Usage
-
-Specify the server to your micro service
-
-```go
-import (
-        "github.com/micro/go-micro"
-        "github.com/micro/go-plugins/server/grpc"
-)
-
-func main() {
-        service := micro.NewService(
-                // This needs to be first as it replaces the underlying server
-                // which causes any configuration set before it
-                // to be discarded
-                micro.Server(grpc.NewServer()),
-                micro.Name("greeter"),
-        )
-}
-```
-**NOTE**: Setting the gRPC server and/or client causes the underlying the server/client to be replaced which causes any previous configuration set on that server/client to be discarded. It is therefore recommended to set gRPC server/client before any other configuration