Improved description

Signed-off-by: Ben Firshman <ben@firshman.co.uk>

README.md

@@ -3,12 +3,12 @@ docker-py
 
 [![Build Status](https://travis-ci.org/docker/docker-py.png)](https://travis-ci.org/docker/docker-py)
 
-An API client for docker written in Python
+A Python library for the Docker Remote API. It does everything the `docker` command does, but from within Python – run containers, manage them, pull/push images, etc.
 
 Installation
 ------------
 
-Our latest stable is always available on PyPi.
+The latest stable version is always available on PyPi.
 
     pip install docker-py