[skip travis] add gitter and license badge

README.md

@@ -2,6 +2,9 @@
 [![Build Status](https://travis-ci.com/blackjack4494/youtube-dlc.svg?branch=master)](https://travis-ci.com/blackjack4494/youtube-dlc)
 [![Downloads](https://pepy.tech/badge/youtube-dlc)](https://pepy.tech/project/youtube-dlc)
 
+[![Gitter chat](https://badges.gitter.im/youtube-dlc/gitter.png)](https://gitter.im/youtube-dlc) 
+[![License: Unlicense](https://img.shields.io/badge/license-Unlicense-blue.svg)](https://github.com/blackjack4494/youtube-dlc/blob/master/LICENSE)
+
 youtube-dlc - download videos from youtube.com or other video platforms
 
 - [INSTALLATION](#installation)