Add badges and changelog references

Author: oleg-nenashev

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Version history (archive)
 
+[![GitHub release](https://img.shields.io/github/release/jenkinsci/docker-commons-plugin.svg?label=changelog)](https://github.com/jenkinsci/docker-commons-plugin/releases/latest)
+
+### Newer versions
+
+See [GitHub Releases](https://github.com/jenkinsci/docker-commons-plugin/releases/latest).
+
 ### 1.15
 
 Release date: (May 13, 2019)

README.md

@@ -1,5 +1,10 @@
 # Docker Commons API Plugin for Jenkins
 
+[![Join the chat at https://gitter.im/jenkinsci/docker](https://badges.gitter.im/jenkinsci/docker.svg)](https://gitter.im/jenkinsci/docker?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+[![Jenkins Plugin](https://img.shields.io/jenkins/plugin/v/docker-commons.svg)](https://plugins.jenkins.io/docker-commons)
+[![GitHub release](https://img.shields.io/github/release/jenkinsci/docker-commons-plugin.svg?label=changelog)](https://github.com/jenkinsci/docker-commons-plugin/releases/latest)
+[![Jenkins Plugin Installs](https://img.shields.io/jenkins/plugin/i/role-strategy.svg?color=blue)](https://plugins.jenkins.io/docker-commons)
+
 API plugin, which provides the common shared functionality for various Docker-related plugins.
 
 ## Summary
@@ -53,3 +58,8 @@ pipeline {
 ## License
 
 [MIT License](http://opensource.org/licenses/MIT)
+
+## Changelog
+
+* See [GitHub Releases](https://github.com/jenkinsci/docker-commons-plugin/releases/latest) for the recent versions
+* See [the release notes archive](./CHANGELOG.md) for version `1.15` and older