Update README.md

Added DDG-style bang searches to feature list in the readme, removed Gitter chat badge

README.md

@@ -5,7 +5,6 @@
 [![Build Status](https://travis-ci.com/benbusby/whoogle-search.svg?branch=master)](https://travis-ci.com/benbusby/whoogle-search)
 [![codebeat badge](https://codebeat.co/badges/e96cada2-fb6f-4528-8285-7d72abd74e8d)](https://codebeat.co/projects/github-com-benbusby-shoogle-master)
 [![Docker Pulls](https://img.shields.io/docker/pulls/benbusby/whoogle-search)](https://hub.docker.com/r/benbusby/whoogle-search)
-[![Gitter](https://img.shields.io/gitter/room/benbusby/whoogle-search)](https://gitter.im/whoogle-search/community)
 
 Get Google search results, but without any ads, javascript, AMP links, cookies, or IP address tracking. Easily deployable in one click as a Docker app, and customizable with a single config file. Quick and simple to implement as a primary search engine replacement on both desktop and mobile.
 
@@ -32,6 +31,7 @@ Contents
 - Dark mode
 - Randomly generated User Agent
 - Easy to install/deploy
+- DDG-style bang (i.e. `!<tag> <query>`) searches
 - Optional location-based searching (i.e. results near \<city\>)
 - Optional NoJS mode to disable all Javascript in results