Add basic badges to readme

README.md

@@ -1,10 +1,13 @@
 # Scrapy Autounit
 
-Scrapy Autounit is an automatic test generation tool for your Scrapy spiders.
+[![AppVeyor](https://ci.appveyor.com/api/projects/status/github/scrapinghub/scrapy-autounit?branch=master&svg=true)](https://ci.appveyor.com/project/scrapinghub/scrapy-autounit/branch/master)
+[![PyPI Version](https://img.shields.io/pypi/v/scrapy-autounit.svg?color=blue)](https://pypi.python.org/pypi/scrapy-autounit/)
 
-## How it works?
+## Overview
 
-Scrapy Autounit generates test fixtures and tests cases as you run your spiders.  
+Scrapy-Autounit is an automatic test generation tool for your Scrapy spiders.
+
+It generates test fixtures and tests cases as you run your spiders.  
 The test fixtures are generated from the items and requests that your spider yields, then the test cases evaluate those fixtures against your spiders' callbacks.
 
 Scrapy Autounit generates fixtures and tests per spider and callback under the Scrapy project root directory.