Merge pull request #3963 from wp-cli/sponsors

Add sponsors to project readme

Author: schlessera

README.md

@@ -3,6 +3,10 @@ WP-CLI
 
 [WP-CLI](https://wp-cli.org/) is a set of command-line tools for managing [WordPress](https://wordpress.org/) installations. You can update plugins, configure multisite installs and much more, without using a web browser.
 
+Ongoing maintenance is <a href="https://make.wordpress.org/cli/2017/04/03/new-co-maintainer-alain-thanks-2017-sponsors/#sponsors">made possible by</a>:
+
+<a href="https://automattic.com/"><img src="https://make.wordpress.org/cli/files/2017/04/automattic-1.png" style="width:19%;height:auto;display:inline-block;vertical-align:middle;" alt="" width="160" height="35" class="aligncenter size-full wp-image-347" /></a> <a href="https://www.bluehost.com/"><img class="aligncenter size-full wp-image-335" style="width:19%;height:auto;display:inline-block;vertical-align:middle;" src="https://make.wordpress.org/cli/files/2017/04/bluehost.png" alt="" width="160" height="26" /></a> <a href="https://www.dreamhost.com/"><img class="aligncenter size-full wp-image-324" style="width:19%;height:auto;display:inline-block;vertical-align:middle;" src="https://make.wordpress.org/cli/files/2017/04/dreamhost.png" alt="" width="160" height="30" /></a> <a href="https://www.siteground.com/"><img class="aligncenter size-full wp-image-332" style="width:19%;height:auto;display:inline-block;vertical-align:middle;" src="https://make.wordpress.org/cli/files/2017/04/siteground.png" alt="" width="160" height="33" /></a> <a href="https://wpengine.com/"><img class="aligncenter size-full wp-image-333" style="width:19%;height:auto;display:inline-block;vertical-align:middle;" src="https://make.wordpress.org/cli/files/2017/04/wpengine.png" alt="" width="160" height="30" /></a>
+
 For announcements, follow [@wpcli on Twitter](https://twitter.com/wpcli) or [sign up for email updates](https://make.wordpress.org/cli/subscribe/). [Check out the roadmap](https://wp-cli.org/docs/roadmap/) for an overview of what's planned for upcoming releases.
 
 [![Build Status](https://travis-ci.org/wp-cli/wp-cli.svg?branch=master)](https://travis-ci.org/wp-cli/wp-cli) [![Dependency Status](https://gemnasium.com/badges/github.com/wp-cli/wp-cli.svg)](https://gemnasium.com/github.com/wp-cli/wp-cli) [![Average time to resolve an issue](https://isitmaintained.com/badge/resolution/wp-cli/wp-cli.svg)](https://isitmaintained.com/project/wp-cli/wp-cli "Average time to resolve an issue") [![Percentage of issues still open](https://isitmaintained.com/badge/open/wp-cli/wp-cli.svg)](https://isitmaintained.com/project/wp-cli/wp-cli "Percentage of issues still open")