Update README.md

README.md

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 # UNO Bot
+
+[![License: AGPL v3](https://img.shields.io/badge/License-AGPL%20v3-blue.svg)](./LICENSE)
+
 Telegram Bot that allows you to play the popular card game UNO via inline queries. The bot currently runs as [@unobot](http://telegram.me/unobot)
 
 To run the bot yourself, you will need: 
 - Python (tested with 3.4 and 3.5)
 - The [python-telegram-bot](https://github.com/python-telegram-bot/python-telegram-bot) module version 5.0.0
 - [Pony ORM](https://ponyorm.com/)
 
-# Setup
+## Setup
 - Get a bot token from [@BotFather](http://telegram.me/BotFather) and place it in `credentials.py`
 - Convert all language files from .po to .mo using `msgfmt unobot.po -o unobot.mo`
 - Use `/setinline` and `/setinlinefeedback` with BotFather for your bot