add iris websocket client side for Go and a simple chat example

Former-commit-id: af1c555b6b092a3d0484fee2e200fd8767d7239e

_examples/websocket/go-client/server/main.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/kataras/iris"
+	"github.com/kataras/iris/websocket"
+)
+
+func main() {
+	app := iris.New()
+	ws := websocket.New(websocket.Config{})
+	app.Get("/socket", ws.Handler())
+
+	ws.OnConnection(func(c websocket.Connection) {
+		go func() {
+			<-time.After(20 * time.Second)
+			c.Disconnect()
+		}()
+
+		c.On("chat", func(message string) {
+			c.To(websocket.Broadcast).Emit("chat", c.ID()+": "+message)
+		})
+
+		c.OnDisconnect(func() {
+			fmt.Printf("Connection with ID: %s has been disconnected!\n", c.ID())
+		})
+	})
+
+	app.Run(iris.Addr(":8080"))
+}