added 0.3.x notice

README.md

@@ -31,6 +31,12 @@
 [![GitHub license](https://img.shields.io/badge/license-LGPL v3-green.svg)](https://raw.githubusercontent.com/crossroadlabs/Express/master/LICENSE)
 [![GitHub release](https://img.shields.io/github/release/crossroadlabs/Express.svg)](https://github.com/crossroadlabs/Express/releases)
 
+<table bgcolor="#ff0000">
+<tr><td>
+<img src="https://www.iconfinder.com/icons/728979/download/png/256" height=64 align="left"/>Virsion 0.3.x (current stable) notice: Current version works with Xcode 7.2, 7.3 and Linux dist released on 03.01.2016. Upcoming version (0.4.x) will fully support Swift 3.0 and will maintain compatibility with Swift 2.2 (Xcode 7.3).
+</td></tr>
+</table>
+
 ### Being [perfectionists](http://www.crossroadlabs.xyz), we took the best from what we think is the best: power of [Play Framework](https://www.playframework.com/) and simplicity of [Express.js](http://expressjs.com/)
 
 #### Express is an asynchronous, simple, powerful, yet unopinionated web application server written in Swift