Add some badges (README.md)
<a href="https://travis-ci.com/async-telegram-bot/async-telegram-bot">
<img src="https://travis-ci.com/async-telegram-bot/async-telegram-bot.svg?branch=dev" />
</a>
+ <a href="LICENSE">
+ <img src="https://img.shields.io/badge/license-MIT-blue.svg">
+ </a>
+ <a href="https://crates.io/crates/async-telegram-bot">
+ <img src="https://img.shields.io/badge/crates.io-v0.1.0-orange.svg">
+ </a>
</div>
