updated readme
updated readme

file:a/readme.txt -> file:b/readme.txt
--- a/readme.txt
+++ b/readme.txt
@@ -1,1 +1,35 @@
+=== Varnish Caching ===
+Tags: varnish, purge, cache
+Requires at least: 4.0
+Tested up to: 4.3
+Stable tag: 3.7.3
+== Description ==
+Varnish Cache Wordpress implementation
+You can control from the Varnish Cache admin panel the following :
+- Enable/Disable caching
+- Homepage cache TTL
+- Cache TTL (for every other page)
+- IPs/Hosts to clear cache to support every type of Varnish Cache implementation
+- Override default TTL in posts/pages
+- Purge key based PURGE
+- Debugging option
+Purges Varnish Cache when your site is modified.
+Varnish Caching sends a PURGE request to Varnish Cache when a page or post is modified. This occurs when editing, publishing, commenting or deleting an item, and when changing themes.
+<a href="https://www.varnish-cache.org/">Varnish</a> is a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. This plugin <em>does not</em> install Varnish for you, nor does it configure Varnish for WordPress. It's expected you already did that on your own.
+Not all pages are purged every time, depending on your Varnish configuration. When a post, page, or custom post type is edited, or a new comment is added, <em>only</em> the following pages will purge:
+* The front page
+* The post/page edited
+* Any categories or tags associated with the page
+Inspired from the following :
+- https://wordpress.org/plugins/varnish-http-purge/
+- https://github.com/dreamhost/varnish-vcl-collection/
+Implemented on :
+- www.bvoltaire.fr