adds doc

.gitignore

@@ -1,3 +1,3 @@
 .idea
-examples/ack/ack
+examples/server/server
 examples/client/client

README.md

@@ -1,5 +1,10 @@
 # TCP
 
+[![GoDoc](https://godoc.org/github.com/rvflash/tcp?status.svg)](https://godoc.org/github.com/rvflash/tcp)
+[![Build Status](https://img.shields.io/travis/rvflash/tcp.svg)](https://travis-ci.org/rvflash/tcp)
+[![Code Coverage](https://img.shields.io/codecov/c/github/rvflash/tcp.svg)](http://codecov.io/github/rvflash/tcp?branch=master)
+[![Go Report Card](https://goreportcard.com/badge/github.com/rvflash/tcp)](https://goreportcard.com/report/github.com/rvflash/tcp)
+
 TCP provides interfaces to create a TCP server.
 
 
@@ -29,15 +34,28 @@ Assuming the following code that runs a server on port 9090:
 ```go
 package main
 
-import "github.com/rvflash/tcp"
+import (
+	"log"
+
+	"github.com/rvflash/tcp"
+)
 
 func main() {
+	// creates a server with a logger and a recover on panic as middlewares.
 	r := tcp.Default()
-	r.ACK(func(c tcp.Conn) {
+	r.ACK(func(c *tcp.Context) {
 		// new message received
-		b := c.RawData()
-		// ...
+		// gets the request body
+		buf, err := c.ReadAll()
+        if err != nil {
+            c.Error(err)
+        }
+		// writes something as response
+		c.String(string(buf))
 	})
-	_ = r.Run(":9090") // listen and serve on 0.0.0.0:9090
+	err := r.Run(":9090") // listen and serve on 0.0.0.0:9090
+	if err != nil {
+		log.Fatalf("listen: %s", err)
+	}
 }
 ```

server_test.go

@@ -0,0 +1,11 @@
+package tcp_test
+
+import "testing"
+
+func TestNew(t *testing.T) {
+
+}
+
+func TestDefault(t *testing.T) {
+
+}