Add badges for license, version, and platform

Author: dfeen87

README.md

@@ -3,6 +3,7 @@
 
 # Smartphone Based Chest Monitoring
 
+[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT)
 [![Version](https://img.shields.io/badge/version-1.0.0-blue.svg)](https://github.com/dfeen87/Smartphone-Based-Chest-Monitoring)
 [![Platform](https://img.shields.io/badge/platform-iOS%20%7C%20Android-lightgrey.svg)](https://github.com/dfeen87/Smartphone-Based-Chest-Monitoring)
 [![C++](https://img.shields.io/badge/C++-17-00599C.svg)](https://isocpp.org/)