Updated all the readmes to be coherent

Author: Nyholm

README.md

@@ -1,3 +1,15 @@
-# Common classes for a  PSR-6 adapter 
-[![Build Status](https://travis-ci.org/php-cache/adapter-common.svg?branch=master)](https://travis-ci.org/php-cache/adapter-common) [![codecov.io](https://codecov.io/github/php-cache/adapter-common/coverage.svg?branch=master)](https://codecov.io/github/php-cache/adapter-common?branch=master)
+# Common PSR-6 Cache pool 
+[![Gitter](https://badges.gitter.im/php-cache/cache.svg)](https://gitter.im/php-cache/cache?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
+[![Latest Stable Version](https://poser.pugx.org/cache/common-adapter/v/stable)](https://packagist.org/packages/cache/common-adapter)
+[![Total Downloads](https://poser.pugx.org/cache/common-adapter/downloads)](https://packagist.org/packages/cache/common-adapter)
+[![Monthly Downloads](https://poser.pugx.org/cache/common-adapter/d/monthly.png)](https://packagist.org/packages/cache/common-adapter)
+[![Software License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](LICENSE)
 
+This repository contains shared classes and interfaces used by the PHP Cache organisation. To read about 
+features like tagging and hierarchy support please read the shared documentation at [www.php-cache.com](http://www.php-cache.com). 
+
+
+### Contribute
+
+Contributions are very welcome! Send a pull request to the [main repository](https://github.com/php-cache/cache) or 
+report any issues you find on the [issue tracker](http://issues.php-cache.com).