Improved readme

Author: Nyholm

README.md

@@ -1,11 +1,11 @@
-# Filesystem PSR-6 adapter 
+# Filesystem PSR-6 adapter using Flysystem
 [![Build Status](https://travis-ci.org/php-cache/filesystem-adapter.svg?branch=master)](https://travis-ci.org/php-cache/filesystem-adapter) [![codecov.io](https://codecov.io/github/php-cache/filesystem-adapter/coverage.svg?branch=master)](https://codecov.io/github/php-cache/filesystem-adapter?branch=master)
 
 This is a implementation for the PSR-6 for a filesystem cache. This implementation supports tags. This adapter 
-required [Flysystem](http://flysystem.thephpleague.com/).
+requires [Flysystem](http://flysystem.thephpleague.com/).
 
-| Feature |   |
-| ------- | - | 
+| Feature | Supported |
+| ------- | --------- | 
 | Flush everything | Yes 
 | Expiration time | Yes
-| Support for tags | Yes
+| Support for tags | Yes