Add features section to README.

Author: MaximAlien

README.md

@@ -3,6 +3,14 @@
 [![Build Status](https://travis-ci.org/MaximAlien/ARPlayer.svg?branch=master)](https://travis-ci.org/MaximAlien/ARPlayer)
 ![License](https://img.shields.io/badge/license-MIT-blue.svg)
 
+## Features
+Current version of ARPlayer has such features:
+- Playback control: pause, stop, next video, previous video.
+- Ability to scale and rotate media player.
+- Animatable and tactile interaction with playback controls.
+- Re-position of the media player within current horizontal plane.
+- Horizontal planes detection.
+
 ## Example
 Full example can be found [here](https://www.youtube.com/watch?v=2cl9tNzfBYc).