readme update for v0.5 release

Author: jeevatkm

README.md

@@ -1,12 +1,13 @@
 # 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-0.4-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)
+[![Version](https://img.shields.io/badge/version-0.5-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)
 
-***v0.4 [released](https://github.com/go-aah/essentials/releases/latest) and tagged on Mar 30, 2017***
+***v0.5 [released](https://github.com/go-aah/essentials/releases/latest) and tagged on Apr 07, 2017***
 
 `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)
+* random string, random byte generation at fixed length
 * go
 * io
 * os