Update README.md

Author: jmdelafe

README.md

@@ -14,6 +14,8 @@
 [![pylxd](https://img.shields.io/badge/pylxd-2.0.5-brightgreen.svg?style=flat-square)](https://pylxd.readthedocs.io/en/stable/)
 [![VNC](https://img.shields.io/badge/svncterm-1.2-yellow.svg?style=flat-square)](https://github.com/dealfonso/svncterm)
 
+[![Codacy Badge](https://api.codacy.com/project/badge/Grade/d691613459d443a6861438a8319daa1d)](https://www.codacy.com/app/LXDoNe/addon-lxdone?utm_source=github.com&utm_medium=referral&utm_content=OpenNebula/addon-lxdone&utm_campaign=Badge_Grade)
+
 <br />
 <br />
 
@@ -23,6 +25,8 @@
 
 [LXD](https://linuxcontainers.org/lxd/) is a daemon which provides a REST API to drive **LXC** containers. Containers are lightweight OS-level Virtualization instances, they behave like Virtual Machines but don't suffer from hardware emulation processing penalties by sharing the kernel with the host. They run bare-metal-like, simple containers can boot up in 2 seconds consuming less than 32MB of RAM and a minimal fraction of a CPU Core. Check out this [performance comparison against KVM](https://insights.ubuntu.com/2015/05/18/lxd-crushes-kvm-in-density-and-speed/) if you don't know much about LXD.
 
+The master branch is subject to changes. We recomend to use one of the stables [releases](https://github.com/OpenNebula/addon-lxcone/releases) you can check at the top of this page.
+
 # Developers
 
 ## Leaders
@@ -103,4 +107,4 @@ Check the [Setup Guide](Setup.md)  to deploy a working scenario.
 - Migration
 - HDD Hotplug
 - Use Ceph with LXD future native support
-- Code migration to Python 3
+- Code migration to Python 3