adding godoc introduction

echo.go

@@ -1,3 +1,34 @@
+/*
+Package echo implements a fast and unfancy micro web framework for Go.
+
+Example:
+
+    package main
+
+    import (
+        "net/http"
+
+        "github.com/labstack/echo"
+        mw "github.com/labstack/echo/middleware"
+    )
+
+    func hello(c *echo.Context) error {
+        return c.String(http.StatusOK, "Hello, World!\n")
+    }
+
+    func main() {
+        e := echo.New()
+
+        e.Use(mw.Logger())
+        e.Use(mw.Recover())
+
+        e.Get("/", hello)
+
+        e.Run(":1323")
+    }
+
+Learn more at https://labstack.com/echo
+*/
 package echo
 
 import (