doc: add Reddit badge

README.md

@@ -4,7 +4,7 @@
 [![Firefox Add-ons](https://img.shields.io/amo/v/violentmonkey.svg)](https://addons.mozilla.org/firefox/addon/violentmonkey)
 [![Microsoft Edge Add-on](https://img.shields.io/badge/dynamic/json?label=microsoft%20edge%20add-on&query=%24.version&url=https%3A%2F%2Fmicrosoftedge.microsoft.com%2Faddons%2Fgetproductdetailsbycrxid%2Feeagobfjdenkkddmbclomhiblgggliao)](https://microsoftedge.microsoft.com/addons/detail/eeagobfjdenkkddmbclomhiblgggliao)
 [![Gitter](https://img.shields.io/gitter/room/violentmonkey/violentmonkey.svg)](https://gitter.im/violentmonkey/violentmonkey)
-[![TravisCI](https://travis-ci.org/violentmonkey/violentmonkey.svg?branch=master)](https://travis-ci.org/violentmonkey/violentmonkey)
+[![Subreddit subscribers](https://img.shields.io/reddit/subreddit-subscribers/ViolentMonkey)](https://www.reddit.com/r/ViolentMonkey/)
 
 Violentmonkey provides userscripts support for browsers.
 It works on browsers with [WebExtensions](https://developer.mozilla.org/en-US/Add-ons/WebExtensions) support.