readme update for v0.4 release

Author: jeevatkm

README.md

@@ -1,12 +1,12 @@
 # essentials - aah framework
-
 [![Build Status](https://travis-ci.org/go-aah/essentials.svg?branch=master)](https://travis-ci.org/go-aah/essentials) [![codecov](https://codecov.io/gh/go-aah/essentials/branch/master/graph/badge.svg)](https://codecov.io/gh/go-aah/essentials/branch/master) [![Go Report Card](https://goreportcard.com/badge/aahframework.org/essentials.v0)](https://goreportcard.com/report/aahframework.org/essentials.v0)
-[![Version](https://img.shields.io/badge/version-0.3-blue.svg)](https://github.com/go-aah/essentials/releases/latest) [![GoDoc](https://godoc.org/aahframework.org/essentials.v0?status.svg)](https://godoc.org/aahframework.org/essentials.v0)  [![License](https://img.shields.io/github/license/go-aah/essentials.svg)](LICENSE)
+[![Version](https://img.shields.io/badge/version-0.4-blue.svg)](https://github.com/go-aah/essentials/releases/latest) [![GoDoc](https://godoc.org/aahframework.org/essentials.v0?status.svg)](https://godoc.org/aahframework.org/essentials.v0)  [![License](https://img.shields.io/github/license/go-aah/essentials.svg)](LICENSE)
 
-***v0.3 [released](https://github.com/go-aah/essentials/releases/latest) and tagged on Mar 16, 2017***
+***v0.4 [released](https://github.com/go-aah/essentials/releases/latest) and tagged on Mar 30, 2017***
 
-`essentials` contain simple & useful utils for go lang. aah framework utilizes essentials (aka `ess`) library across. Essential library complements with handy methods for:
+`essentials` contains simple & useful utils methods for Go. aah framework utilizes essentials (aka `ess`) library across. Essentials library complements with handy methods, refer godoc to know more about methods:
 * filepath
+* GUID (Globally Unique Identifier)
 * go
 * io
 * os
@@ -23,10 +23,4 @@
 go get -u aahframework.org/essentials.v0
 ```
 
-#### Development Version - Edge
-```sh
-# install the development version
-go get -u aahframework.org/essentials.v0-unstable
-```
-
 See official page [TODO]