Add package comments

client/client.go

@@ -1,24 +1,3 @@
-/*
-Package client provides a method to make synchronous, asynchronous and
-streaming requests to services. By default json and protobuf codecs are
-supported.
-
-	import "github.com/micro/go-micro/client"
-
-	c := client.NewClient()
-
-	req := c.NewRequest("go.micro.srv.greeter", "Greeter.Hello", &greeter.Request{
-		Name: "John",
-	})
-
-	rsp := &greeter.Response{}
-
-	if err := c.Call(context.Background(), req, rsp); err != nil {
-		return err
-	}
-
-	fmt.Println(rsp.Msg)
-*/
 package client
 
 import (