Add Gitter badge

Author: gitter-badger

README.md

@@ -1,8 +1,10 @@
-:snail: useful-scripts [![License](https://img.shields.io/badge/license-Apache%202-4EB1BA.svg)](https://www.apache.org/licenses/LICENSE-2.0.html)
+:snail: useful-scripts
 ====================================
 
 <img src="docs/script-logo.png" width="20%" align="right" />
 
+[![License](https://img.shields.io/badge/license-Apache%202-4EB1BA.svg)](https://www.apache.org/licenses/LICENSE-2.0.html)
+[![Join the chat at https://gitter.im/oldratlee/useful-scripts](https://badges.gitter.im/oldratlee/useful-scripts.svg)](https://gitter.im/oldratlee/useful-scripts?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![GitHub stars](https://img.shields.io/github/stars/oldratlee/useful-scripts.svg?style=social&label=Star&)](https://github.com/oldratlee/useful-scripts/stargazers)
 [![GitHub forks](https://img.shields.io/github/forks/oldratlee/useful-scripts.svg?style=social&label=Fork&)](https://github.com/oldratlee/useful-scripts/fork)