readme update for v0.2.1 release

[ci skip]

README.md

@@ -1,7 +1,7 @@
 # aruntime - aah framework
-[![Build Status](https://travis-ci.org/go-aah/aruntime.svg?branch=master)](https://travis-ci.org/go-aah/aruntime) [![codecov](https://codecov.io/gh/go-aah/aruntime/branch/master/graph/badge.svg)](https://codecov.io/gh/go-aah/aruntime/branch/master) [![Go Report Card](https://goreportcard.com/badge/aahframework.org/aruntime.v0)](https://goreportcard.com/report/aahframework.org/aruntime.v0) [![Version](https://img.shields.io/badge/version-0.2-blue.svg)](https://github.com/go-aah/aruntime/releases/latest) [![GoDoc](https://godoc.org/aahframework.org/aruntime.v0?status.svg)](https://godoc.org/aahframework.org/aruntime.v0)  [![License](https://img.shields.io/github/license/go-aah/aruntime.svg)](LICENSE)
+[![Build Status](https://travis-ci.org/go-aah/aruntime.svg?branch=master)](https://travis-ci.org/go-aah/aruntime) [![codecov](https://codecov.io/gh/go-aah/aruntime/branch/master/graph/badge.svg)](https://codecov.io/gh/go-aah/aruntime/branch/master) [![Go Report Card](https://goreportcard.com/badge/aahframework.org/aruntime.v0)](https://goreportcard.com/report/aahframework.org/aruntime.v0) [![Version](https://img.shields.io/badge/version-0.2.1-blue.svg)](https://github.com/go-aah/aruntime/releases/latest) [![GoDoc](https://godoc.org/aahframework.org/aruntime.v0?status.svg)](https://godoc.org/aahframework.org/aruntime.v0)  [![License](https://img.shields.io/github/license/go-aah/aruntime.svg)](LICENSE)
 
-***v0.2 [released](https://github.com/go-aah/aruntime/releases/latest) and tagged on Mar 14, 2017***
+***v0.2.1 [released](https://github.com/go-aah/aruntime/releases/latest) and tagged on Apr 15, 2017***
 
 Runtime library is built to get, manipulate GoRoutines stack trace, etc.
 
@@ -14,10 +14,4 @@ Runtime library is built to get, manipulate GoRoutines stack trace, etc.
 go get -u aahframework.org/aruntime.v0
 ```
 
-#### Development Version - Edge
-```sh
-# install the development version
-go get -u aahframework.org/aruntime.v0-unstable
-```
-
 See official page [TODO]